The Patchwork Girl of Oz by L. Frank Baum

An unlucky Munchkin boy named Ojo must travel around Oz gathering the ingredients for an antidote to the Liquid of Petrifaction which has turned his beloved uncle Unc Nunkie and the wife of the Liquid's creator into marble statues. Ojo is joined by the patchwork girl Scraps, Dorothy, Dr. Pipt's Glass Cat, the Woozy, the Shaggy Man, the Scarecrow and the Tin Woodman. They eventually visit the Emerald City to ask for help from the Wizard of Oz.