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Guy Raz
Grown Ups Wondery subscribers can listen to wow in the World early and ad free right now. Join Wondery in the Wondery App or Wondery Kids plus on Apple Podcasts.
Mindy Thomas
Hey wowhouser fams. Mindy here. And before we start the show, it's almost Halloween and to celebrate with all of Boo. I mean you, we've put together some of our favorite spooky episodes of wow in the World and Halloween experiments and crafts all in one place. So you can make your Halloween extra WOW from home. Plus, if you want to dress up like someone from the wow crew this year, you can find Halloween costume ideas from your fellow wowzers there too. We can't wait to see what costumes you come up with this year. Oh, and just a tip for how to make your Mindy costume more realistic, add some leftover Mac and cheese to your jacket pocket. For activities, episodes, videos and more wows, visit Tinkercast.com Halloween that's Tinkercast.com Halloween that's it. And now let's get back to the show.
Sponsor Announcer
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Dennis
We wow on the weekend. Wee wow on the weekend. Wee wow on the weekend. Cause this is what we do on the weekend. Talking, laughing. Me and Reggie singing, laughing. And then we. Oh, wait, no, I said laughing twice. Whatever. We wow on the weekend. Yeah. We wow on the weekend. Laugh, laugh. We wow on the weekend. Cause this is what we do on the weekend. Hello and welcome to. Welcome to Wee Wow on the Weekend. I'm your host, Dennis, and that's my co host, Reggie. We're here in my mother's basement with an incredibly special guest.
Post Officer Jen (Jellybird)
Hello.
Dennis
No, quiet. Not yet. I need to play the guest segment song.
Post Officer Jen (Jellybird)
Oh, sorry.
Dennis
Okay. Guest segment. The segment with the guest. A guest comes on the show and just like the title suggests, we bring them out and then we.
Post Officer Jen (Jellybird)
Stop, stop, stop, stop, stop, stop.
Dennis
Um, is everything all right?
Post Officer Jen (Jellybird)
Yeah, just that the song is long and kind of awful and it's making me a little nauseous.
Dennis
Oh, right.
Guy Raz
Yeah.
Dennis
Anyway, my guest today is the all important, all knowing, all delivering post office mail carrier. Welcome, post officer.
Post Officer Jen (Jellybird)
My name's Jen.
Dennis
I'm sorry, did you say your name is Jared?
Post Officer Jen (Jellybird)
No, my name is Jen.
Dennis
Chad.
Post Officer Jen (Jellybird)
Jen. My name is Jen. As in Jennifer.
Dennis
No, your name is Jellybird.
Post Officer Jen (Jellybird)
Can you not hear very well?
Dennis
Jellybird is the cutest name I've ever heard.
Post Officer Jen (Jellybird)
Wonderful. I'm thrilled for you.
Dennis
Welcome, Post officer Jellybird. Hooray.
Post Officer Jen (Jellybird)
Thank you. Hey, Reggie.
Dennis
Wait, you two know each other?
Post Officer Jen (Jellybird)
Yeah, I'm a mail carrier. I know everyone.
Dennis
Oh, wow.
Post Officer Jen (Jellybird)
Hey, Reg, we still on for Thursday night? Nice.
Dennis
Hey, what's on Thursday night?
Post Officer Jen (Jellybird)
Oh, we play cards.
Dennis
Oh, really? Just the two of you?
Post Officer Jen (Jellybird)
Oh, no, there's. There's a few other guys.
Dennis
I know a guy. Guy Raz.
Post Officer Jen (Jellybird)
Actually, I shouldn't have said guys. I meant people. There are a few other people who play with us.
Dennis
Oh.
Post Officer Jen (Jellybird)
But also Guy Raz.
Dennis
Aw. I want to play.
Post Officer Jen (Jellybird)
You can come if you want.
Dennis
What game do you play?
Post Officer Jen (Jellybird)
Euchre.
Dennis
Oh, no. Ew. I want to play pinochle.
Post Officer Jen (Jellybird)
No.
Dennis
Fine. Never Mind? I don't want to come.
Post Officer Jen (Jellybird)
Alrighty.
Dennis
So Post Officer Jellybird, please tell us about what it's like to deliver the mail.
Post Officer Jen (Jellybird)
Well, the first thing you gotta do is sort the mail.
Dennis
Oh, hear that, Reggie? She sorts it. And then what?
Post Officer Jen (Jellybird)
Then I put it all in my truck.
Dennis
Ah, what truck? Can I drive your truck?
Post Officer Jen (Jellybird)
No.
Dennis
Can I pretend to drive your truck?
Post Officer Jen (Jellybird)
Negative.
Dennis
Can I sit in the passenger seat? Uh, can I look at your truck while you drive it?
Mindy Thomas
Yes.
Dennis
Hooray. Okay, what happens after the truck is all loaded with mail?
Post Officer Jen (Jellybird)
Then I deliver them to the corresponding addresses.
Guy Raz
Wow.
Dennis
Corresponding. You're so well spoken.
Post Officer Jen (Jellybird)
Thank you.
Dennis
And I notice you have a key on a long chain. What's that about?
Post Officer Jen (Jellybird)
Uh, yeah, this is called an arrow key because it's kind of arrow shaped.
Dennis
Oh, yeah, I see.
Post Officer Jen (Jellybird)
And I use this key to open up the mailboxes.
Dennis
Wait, all of them?
Guy Raz
Yep.
Dennis
That's the most amazing key I've ever seen. A key that can open anything in the world?
Post Officer Jen (Jellybird)
Well, not anything.
Dennis
Can it open a house with 15 locks on the door?
Post Officer Jen (Jellybird)
No.
Dennis
Can it open a treasure chest full of jewels?
Guy Raz
No.
Dennis
Can it open a spaceship and then turn on the spaceship and you can fly around?
Post Officer Jen (Jellybird)
No, just the mailboxes.
Dennis
Wow. Just mailboxes. Okay, next question. Post Officer Jellybird. Alrighty, we are now in the dinner. Do you also deliver all the emails?
Mindy Thomas
What?
Post Officer Jen (Jellybird)
No.
Dennis
You don't carry them around in your email bag and put them in everyone's computers?
Post Officer Jen (Jellybird)
I do not.
Dennis
Ah, well, that's a little disappointing. Okay, next question.
Post Officer Jen (Jellybird)
This is a weird interview.
Dennis
Post Officer Jellybird. The question on everyone's mind is, what's in the mail?
Post Officer Jen (Jellybird)
Well, there's letters, postcards, the odd parcel, packages.
Dennis
Right, right, right, right, right, right, right. But what's in everyone's mail? What are people writing to each other?
Post Officer Jen (Jellybird)
Well, I can't go around reading other people's mail. Uh huh. There are rules about that.
Dennis
Yeah, laws. Oh, for sure, for sure.
Post Officer Jen (Jellybird)
Ordinances, various regulations that absolutely forbid me or anyone else from opening other people's mail.
Dennis
Ah, right. Not open it, but you can look at the outside of it.
Post Officer Jen (Jellybird)
Exactly. And I do have some of yours here if you want to take a look. See?
Dennis
Oh, my mail delivered live on the show. This is so exciting.
Guy Raz
Exciting?
Dennis
What'd I get? What'd I get?
Post Officer Jen (Jellybird)
Okay, you got a catalog from a clothing store called Super Villain Outfitters.
Dennis
Oh, that's an old subscription.
Post Officer Jen (Jellybird)
And a static electricity bill.
Dennis
Must be the wrong.
Post Officer Jen (Jellybird)
And the rest are letters addressed to someone named Staticy.
Dennis
Okay, thank you so much. Post Officer Jellybird, this has been a terrific interview, but I believe that's all the time we have for today. Yes, it is. Reggie.
Post Officer Jen (Jellybird)
Is he always like this?
Dennis
Rajay, I am not always nervous and sweaty. I'm just excited to move on to the next segment is all.
Post Officer Jen (Jellybird)
So that's the end.
Dennis
The guest segment is over. But next is a little segment I like to call Inside Tinkercast Studios. Inside Tinkercast Studios.
Post Officer Jen (Jellybird)
Do you want me to stay?
Sponsor Announcer
Yes.
Dennis
Oh, this is the part where we revisit an episode of one of my favorite Tinkercast shows. And today, today we're listening to wow in the World, Season 1, Episode 17 called Brain Freeze.
Post Officer Jen (Jellybird)
This sounds interesting.
Dennis
I know. It's an episode where it's so hot out that Mindy's gingerbread house caves in.
Post Officer Jen (Jellybird)
I remember that her gingerbread mailbox melted too. I had to put her mail next to a puddle of icing.
Dennis
Oh, that's some good behind the scenes information.
Post Officer Jen (Jellybird)
Behind the scenes of what?
Dennis
Never you mind. Post Officer Jellybird, would you like to do the honors of pressing play?
Post Officer Jen (Jellybird)
All righty. And here we go.
Mindy Thomas
Wee wow will be right back. Grown ups, this message is for you. That's it. Now back to the show.
Dennis
What in the world?
Guy Raz
Oh, the dog days of summer have officially arrived.
Mindy Thomas
Yep, hotter than a jalapenos armpit out here, Guy.
Guy Raz
Raz, I'm sweating like Richard Simmons to the oldies.
Mindy Thomas
I'm sweating like a long tailed cat in a room full of rocking chairs. Know what I mean?
Post Officer Jen (Jellybird)
Well.
Guy Raz
Oh yeah, I get it. Because the cat doesn't want its tail to eat.
Mindy Thomas
No, it's not as funny when you have to explain it.
Guy Raz
So what are we gonna do about the roof of your house, Mindy?
Mindy Thomas
Yeah, I don't know. I mean, this happens every summer. The roof just sort of melts and then caves in.
Guy Raz
Yeah, but it does look great during the month of December.
Mindy Thomas
Yeah, but this time it's gonna take us until at least December to rebuild it.
Guy Raz
Wait, us?
Mindy Thomas
Well, you don't expect me to rebuild a life size gingerbread house all by myself, do you? Uh, who's gonna help keep me from eating all the candy?
Guy Raz
No, no. I was the one who advised you against living in a human sized gingerbread house to begin with. And I was the one who took you to the emergency room after you got sick from eating your own front door.
Mindy Thomas
This chocolate door sure does look delicious. Maybe I'll just take one little bite. Okay, it was. Maybe I'll just take one more. Oh, hey, Guy.
Dennis
Raz.
Post Officer Jen (Jellybird)
Mindy.
Guy Raz
Mindy what happened? Where is your front door? Is that the doorknob sticking out of your mouth? Mindy, that door was over a hundred pounds of chocolate, and you ate it all. Oh, boy. Come on, we're going to the doctor.
Mindy Thomas
Okay, so I did eat my entire chocolate door, but I learned my lesson.
Guy Raz
Well, that's good.
Mindy Thomas
And now I only eat the butterscotch windows.
Guy Raz
We are not rebuilding that gingerbread house, Mindy. I mean, it's. It's too hot outside. And, hey, by the way, do you have anything cold and refreshing that we can take from the freezer?
Mindy Thomas
Ooh, yeah, we can bake some brown cows.
Guy Raz
Some what?
Mindy Thomas
But we gotta move fast before the kitchen caves in. Here, quick, put on this helmet.
Guy Raz
Mindy, this is a walnut shell tied to a shoelace.
Mindy Thomas
It'll adjust to fit your tiny head. Come on, let's go.
Guy Raz
Mindy, this doesn't feel safe.
Mindy Thomas
Quick, hand me the vanilla ice cream. But I want chocolate. Whatever. Just scoop it into this bucket.
Guy Raz
Okay. Like this? Yeah.
Mindy Thomas
Now dump in these 45 bottles of root beer.
Dennis
Are you sure these are the right measurements?
Mindy Thomas
Measurements, measurements. Quick, grab a couple of straws.
Dennis
I can't find the straws.
Mindy Thomas
Cindy, grab those pool noodles over there. We don't have time to wait, Mindy.
Post Officer Jen (Jellybird)
We.
Dennis
We have to get out of here.
Guy Raz
It's. It's about to crash in on us.
Mindy Thomas
Whoa. Come on, let's go.
Guy Raz
That was a close call.
Mindy Thomas
Yeah, I'm gonna miss that gingerbread house. But with a little spit and elbow grease, it'll be good as new before you know it. Actually, better than new. It'll be a gingerbread mansion. Phew.
Guy Raz
I'm so hot and thirsty. Can I take a sip of this? By the way, what is this?
Mindy Thomas
It's a brown cow, Guy Raz. Ice cream and root beer.
Guy Raz
Well.
Post Officer Jen (Jellybird)
Oh, no.
Guy Raz
Normally, I would not drink something like this. Too much sugar and lots of fruit, food coloring. But I'm just so hot. And why is it in the bucket?
Mindy Thomas
I like things over the top.
Guy Raz
Ha ha. Never would have guessed.
Mindy Thomas
Here, take this pool noodle and suck it up like a straw. Ooh, looks like someone's got a case of the ol. Sphenopalatine ganglion neuralgia. Mega brain freeze guy. Raz, you sucked up that entire bucket of brown cow so fast that you gave yourself brain freeze.
Dennis
What?
Mindy Thomas
You know, brain freeze. That quick, intense headache you get when you guzzle down something cold too fast.
Guy Raz
Ah, but what just happened?
Mindy Thomas
Well, funny you should ask, because I was actually just reading about this and. Okay, so according to Dr. Stephanie Vertrees, a headache specialist and a professor at the Texas A and M College of Medicine Research. Brain freeze is what happens when cold food touches a bundle of nerves in the back of your palate or, you know, the roof of your mouth.
Guy Raz
Well, this must have been something different, because it felt more like a quick, sharp headache.
Mindy Thomas
Well, that's because that bundle of nerves called the sphenopalatine ganglion.
Guy Raz
That's a mouthful, literally.
Mindy Thomas
So the sphenopalatine ganglion, or as some scientists just call it, the spg.
Guy Raz
That's better.
Mindy Thomas
Yeah. So the SPG nerves are so super sensitive to cold foods, and when the cold food caves in on them, they freak out and tell the brain it's headache time.
Guy Raz
But why?
Mindy Thomas
You mean why can't the brain just deal?
Guy Raz
Well, yeah. I mean, it's hot outside, and I just wanted to drink something cold and delicious as fast as I could to cool off.
Mindy Thomas
Well, there's another neuroscientist, the kind of scientist that studies the nervous system. So, like the brain, the spinal cord, and the nerve cells. His name is Dr. Duane Godwin.
Guy Raz
And does. Does he have the answer?
Mindy Thomas
Well, he says that the one thing our brains don't like is when things change quickly. And that brain freeze is there to prevent it. To be like, whoa, whoa, whoa, buddy, hold it right there. What are you doing? It tends to happen when the weather in your body are super hot and the food touching the roof of your mouth is super cold.
Guy Raz
Well, is there a cure for brain freeze?
Mindy Thomas
Okay, so so far, there's no cure for brain freeze. And since they come and go lickety split and aren't really dangerous for us, it's easier to just avoid them altogether.
Guy Raz
So how do you do that?
Mindy Thomas
Well, Dr. Vertrees has some good advice that might come in handy the next time you decide to inhale a bucket of root beer and ice cream.
Guy Raz
Interesting. And what did she say?
Mindy Thomas
So she says that if you want to avoid brain freeze, to just chill out and eat cold food slowly, that way your mouth can warm up your food and not freak out the SPG nerves in the back of your palate.
Guy Raz
This would have been some helpful information before I sucked down that brown cow. Mindy.
Mindy Thomas
Well, Guy Raz, technically, your brain freeze was your body telling you to slam on the brakes and slow it down while you were slurping that brown cow up as fast as you could, but you just weren't listening.
Dennis
Huh.
Guy Raz
Interesting. So, Mindy, you mentioned that those nerves are located in the back of the roof of our mouths. And that's right where the ice cream was hitting it.
Mindy Thomas
Yeah, so Dr. Vertrees also says that it's safer to keep the food in the front of your mouth, because when you hit those nerves further back, they trigger the brain freeze bonanza.
Guy Raz
But what if you get really hot and really excited and give yourself brain freeze anyway?
Mindy Thomas
Like if you see a milkshake or an ice cream float and your brain just freezes and you forget everything I just told you?
Guy Raz
Well, not necessarily.
Mindy Thomas
Yeah, look, I know how much you love your kombucha almond milkshake, so I do know of one good trick.
Guy Raz
Oh, yeah? Well, what is it? I'll do anything to keep that from happening again.
Mindy Thomas
Okay, so if you feel a brain freeze coming on.
Guy Raz
Yes?
Mindy Thomas
Just put a jelly bean in your bowl. Belly button.
Dennis
What?
Mindy Thomas
Okay, wait. Wrong remedy. If you feel a brain freeze coming on, tilt your head back and press your tongue to the roof of your mouth for ten seconds.
Guy Raz
Okay.
Mindy Thomas
And with your tongue on the roof of your mouth, say, I'm a little teapot.
Guy Raz
What?
Mindy Thomas
Trust me.
Guy Raz
I'm a little teapot.
Mindy Thomas
Nice.
Guy Raz
I'm a little teapot.
Mindy Thomas
You're a little teapot.
Guy Raz
Are you sure this was.
Mindy Thomas
The heat from your tongue will warm up the sinuses behind your nose and then warm up the SPGs that cause the brain freeze to happen in the first place.
Guy Raz
So, Mindy, if brain freeze is so harmless and quick to go away on its own, why do these scientists even bother to study it?
Mindy Thomas
Well, it turns out that understanding how brain freeze works can also help scientists to understand how some other more serious headaches work and can be treated.
Guy Raz
Like migraine headaches.
Mindy Thomas
Yeah. So those SPG nerves that we've been talking about are also responsible for migraines and cluster headaches, which can be super painful and last way longer than your typical ice cream headache.
Guy Raz
Wow. So understanding these SPG nerves could possibly help scientists figure out different ways of dealing with other kinds of headaches.
Mindy Thomas
Yeah, exactly. And in fact, according to Dr. Vertrees, some people will purposely give themselves brain freeze in an effort to break their migraine headaches.
Guy Raz
And that works?
Mindy Thomas
Well, she says it can actually work, but not always.
Guy Raz
For everyone, the body and the brain do hold many mysteries.
Mindy Thomas
They sure do. Little teapot?
Guy Raz
No.
Mindy Thomas
Hey, so now that you're all cooled off, are you ready to start helping me rebuild my gingerbread house?
Guy Raz
No way, Mindy. No way.
Mindy Thomas
Okay, well, then I'll just have to move in on your fancy new couch.
Guy Raz
Pass me the gumdrop and frosting.
Mindy Thomas
Okay, so I'm thinking we start with a wraparound peppermint porch and a chocolate pond and a sugarless gum diving board off the roof. And I want five stories and a gumdrop dorm.
Dennis
Wow. That was so cool. What did you think, Post Officer Jellybird?
Post Officer Jen (Jellybird)
Yeah, that was pretty good. Kind of made me want a soft serve or maybe an Italian ice.
Dennis
Me too. We should go get ice cream.
Post Officer Jen (Jellybird)
I'm game.
Dennis
Hooray. Ice cream.
Post Officer Jen (Jellybird)
Are you just gonna leave all the mics?
Dennis
Yeah, it's kind of a bit we do.
Post Officer Jen (Jellybird)
Oh, okay.
Dennis
What kind of ice cream do you want, Post Officer Jellybird? I want one of those popsicles with the gumball eyes.
Post Officer Jen (Jellybird)
Ooh, those things freak me out.
Dennis
I also want a frozen candy bar.
Post Officer Jen (Jellybird)
Is that ice cream?
Dennis
No. But now I want to freeze everything before I eat it. Reggie, I am not going to get brain freeze. I learned from wow in the World that if you.
Mindy Thomas
Grown ups, if you like wow in the World, you can listen early and ad free right now on Wondery.
Guy Raz
Join Wondery in the Wondery app or on Wondery Kids plus on Apple Podcasts prime members can listen ad free on Amazon Music.
Mindy Thomas
And before you go, tell us about yourself by filling out a short survey@wondery.com survey thanks for joining us for this edition of Wewow on the weekend. Our show is written by Ruth Morrison and Jed Anderson. Original sound design and production is done by Henry Moskal and Merrit Lozano with help from Jed Anderson and Tyler Thole. Original music for We Wow on the Weekend is composed and performed by Tyler Thole.
Guy Raz
Special thanks to Steph Sosa, Rebecca Caban and all of the other Tinkerers at Tinkercast hq.
Mindy Thomas
There's still time to share your wee wow crafternoon challenges with us grown ups. You can upload pictures and videos of your projects to us@tinkercast.com or call us at 1-888-7-WOW WOW.
Guy Raz
Our website is tinkercast.com there you can learn more about becoming an official member of the World Organization of wowzers, learn about upcoming events, shop our shop and pick up a copy of the latest edition of our number one New York Times best selling book series wow in the Wild.
Mindy Thomas
Thanks again for thinking tinkering except experimenting and exploring with us this week. Meet us back here on Monday for Wow in the World and remember who wows We Wow.
Dennis
Wow wow wow.
Mindy Thomas
Wow in the World was made by Tinkercast and sent to you by Wondery.
Release Date: October 19, 2025
Hosts: Dennis, Post Officer Jen (Jellybird), Mindy Thomas, Guy Raz, Reggie
Podcast: Tinkercast | Wondery
This playful weekend episode of Wow in the World centers on fun science talk with a focus on the mysteries of brain freeze! Host Dennis is joined by Post Officer Jen (aka Jellybird) for a quirky mail-themed segment before revisiting a classic "Wow in the World" episode (“Brain Freeze”) with Mindy and Guy. The episode blends educational science facts, relatable humor, behind-the-scenes moments, and tips for kids about mail delivery, brain freeze, and staying curious.
They make a cold treat, “brown cows” (root beer floats with ice cream), and Guy gets a brain freeze after drinking too quickly.
Research into brain freeze helps scientists understand and treat more serious headaches, like migraines.
This episode offers a lively mashup of silly interviews, fascinating science facts, and genuine curiosity. Listeners learn all about the job of mail carriers (and why they don’t deliver your emails!), and then dive into a classic Wow in the World segment all about brain freeze—what causes it, how to avoid it, and what scientists can learn from it. The episode is packed with memorable lines, playful tone, and practical wisdom, leaving listeners hungry for both knowledge and ice cream.
Perfect for: Kids, families, and the naturally curious who love their science with a big serving of laughter.