Sid the Science Kid Why Are Wheels Round? With this Why Are Wheels Round? Learning Science Kit, kids can observe how the shape of wheels affects car movement and what happens if they race a car on different surfaces or at different angles Sticker sheet, 24-page journal Jim Henson's Sid the Science Kid is a popular animated science-readiness series for preschoolers on PBS Kids In its September 2008 debut, it ranked #1 among moms with children under 3, and it tied for the #2 PBS Kids show Sid the Science Kid also recently landed 2 daytime Emmy nominations