Brains On! Science Podcast for Kids

Episode: Sport Science – Softballs, Baseballs, and Curve Balls

Date: April 7, 2026
Host: Molly Bloom
Kid Co-host: Kian (Toronto, Canada)
Special Guests/Voices: Mark, Sandon, various listener contributors

Episode Overview

This lively episode of Brains On! dives into the science behind baseball and softball, exploring how balls curve, what's inside them, and the physics that makes these sports possible. Listeners, especially kids, are treated to fun history, clear explanations of tricky concepts like the Magnus effect, and plenty of silly moments. The show is peppered with science chants, mystery sounds, and interactive segments designed to spark curiosity and help young minds think like scientists at the ballpark.

Key Discussion Points

A. The Science of Baseball & Softball

• (01:59 – 02:15):

  • Baseball and softball are not just sports—they’re full of science! Every pitch, swing, and cheer involves physics, engineering, and even psychology.
  • “There’s physics in every pitch.” (Molly, 02:04)
  • “There’s even psychology in the chants we use to psych out our opponents…” (Molly, 02:15)

• Baseball positions, favorite teams, and the feeling of making plays on the field
  (03:33 – 05:18):

  • Kian plays first base for his summer league, enjoys both fielding and hitting.
  • “It just feels like a good feeling… Also because it’s first base, not third.” (Kian, 04:08)
  • Stretching to catch a ball can “almost feel like doing the splits sometimes.” (Molly, 05:01; Kian, 05:05)

B. History & Physics of the Curveball

• Origin Story:
  (07:04 – 09:54)

  • Listener question: "Why do baseballs curve when pitchers throw it?" (Abel, 07:04)
  • Story of William “Candy” Cummings, who invented the curveball after tossing clamshells, noticing their curved path, and trying the same with baseballs.
  • “Wouldn’t it be a good joke on the boys if I could get the baseball to curve like that?” (William, in storytelling, 08:38)
  • After years of practice, Candy Cummings brought the curveball to pro baseball.

• Physics Explained:
  (16:35 – 19:30)

  • The curve comes from the way the ball is spun as it's thrown, not from hidden pilots, magnets, or fans.
  • When a pitcher puts spin on the ball, air molecules pile up on one side, creating pressure differences and causing the ball to bend in the air.
  • “For every action, there is an equal and opposite reaction.” (Molly, 18:46)
  • The Magnus effect: spinning shoots air molecules off one side of the ball, pushing it in the opposite direction.
  • “That creates more pressure up top and less pressure below. That extra pressure on top pushes down on the ball…” (Molly, 18:00)

C. Inside Baseballs and Softballs

• Listener Question:
  (23:36 – 26:10)

  • "What are baseballs made of?" (Titus, 23:36)
  • Interactive segment with a “talking ball,” the X-ray “scanometer,” and visualizing all the layers.

• Breakdown of a Baseball:

  • Center: cork (from cork trees), wrapped in rubber.
  • Next layer: tightly wound yarn.
  • Outer layer: white leather with exactly 108 red stitches.
  • “And get this. There are exactly 108 stitches on a regulation baseball.” (Molly, 25:12)
  • In the old days, the core might be made of melted shoe rubber (“shoeball”).
  • Official rules now standardize construction for fairness.

• Softballs:

  • Made from a solid material, often a mix of rubber, cork, or polyurethane.
  • “They’re not actually soft… no special inner core.” (Molly, 25:58)

D. Science Chants, Listener Fun & Mystery Sounds

• Science Chants for Sports:
  (02:24, 15:43, 22:02)

  • Listeners sent in original chants rooting for science with lots of energy and wordplay.
    • “Science, go, Science, go. You make our brains grow!” (Waverly, 02:24)
    • “Science, science, S-C-I-E-N-C-E, Science, yeah… Cosine sin, Science is a fast, fast dance.” (Listener chant, 15:43)
    • “Science, science, you’re the best. Science, science never rests.” (Various listeners, 22:15)

• Mystery Sound:
  (10:08, 27:50, 28:39)

  • Mystery sound guessing game keeps listeners engaged.
  • Correct answer revealed: “cutting black walnut wood with a handsaw.” (Gabby from Boston, 28:39)
  • Kian guesses correctly: “Sawing wood.” (27:50, 28:15, 28:55)

• Mailbag Trend Update:
  (20:26 – 21:35)

  • Listener Ella reports on a ski helmet candy trend in Vermont: kids stick gummy candy to their helmets for snacking.

Notable Quotes & Memorable Moments

"It’s almost like science is the real MVP."
— Molly (02:21)

“There’s physics in every pitch…there’s high speed calculations behind every swing.”
— Molly (02:04, 02:08)

“Wouldn't it be a good joke on the boys if I could get the baseball to curve like that?”
— Storytelling (Candy Cummings), (08:38)

“For every action, there is an equal and opposite reaction.”
— Molly (18:46) (referring to Newton’s Third Law and the Magnus effect)

“At your center, there's cork and rubber. Then that's wrapped in yarn, and it's all covered with leather and stitches.”
— Kian, recapping what’s inside a baseball (26:17)

“Shoeball. Wild.”
— Kian, on old baseball construction (25:38)

“A talking ball! Okay, forget normal. Weird is more fun anyway.”
— Kian (23:08)

Timestamps for Important Segments

| Segment | Timestamp | Description | |---------|-----------|-------------| | Show intro & science of baseball/softball | 01:59 – 02:21 | Why these sports are so scientific | | Co-host Kian’s baseball background | 03:33 – 05:18 | Real kid’s perspective on playing | | Curveball listener question | 07:04 | Why do balls curve? | | Curveball origin story | 07:44 – 09:54 | Inventor Candy Cummings | | Physics behind curveball (Magnus effect) | 16:35 – 19:30 | How the spin makes the ball curve | | What are baseballs made of? | 23:36 – 26:10 | Ball dissection, history, comparison to softballs | | Science chants | 15:43, 22:02 | Listener-created chants for science and sports | | Mystery sound activity | 10:08, 28:39 | Guessing and answer reveal | | Listener mailbag | 20:26 – 21:35 | Candy helmet trend update |

Flow & Tone

• Accessible: Science concepts (like the Magnus effect) are explained with analogies kids can grasp (spinning tires in mud, clamshells on the beach).
• Playful and Energetic: Dialogue is full of jokes, playful banter, and imaginative moments (e.g., talking baseball, fictional snacks like “fried photons”).
• Interactive: Mystery sound, audience chants, and listener trend reports make the episode feel participatory and kid-powered.
• Encouraging Curiosity: Repeated invitations for listeners to send in questions, sounds, and ideas.

Conclusion: Recap & Final Takeaways

• Science is deeply woven through every aspect of baseball and softball, from the way balls curve, to the materials they’re made of, to the strategies and chants used in the game.
• The curveball’s spin creates pressure differences and the Magnus effect, bending its path through the air.
• Baseballs are intricate objects: cork, rubber, yarn, and leather—each layer with purpose.
• Softballs differ in design—solid throughout, not really “soft.”
• The community of curious kids fuels the podcast, and their creativity shines in chants and mystery activities.

How to Participate & Keep Exploring

• Submit your science questions, sounds, drawings, and suggested new “Brains On headquarters” rooms at brainson.org/contact.
• Listen in for more episodes and join the SmartyPass club for book chats, ad-free episodes, and more.

“We love combining sports and science… we can all root for science!”
— Molly, Kian, Mark, and the Brains On! Team