This story follows a young girl named Candy and her neighbor Cato as they explore different geometric shapes while trying to fix Cato's bike, which has square wheels. Candy teaches Cato that the bike needs circular wheels to function, and they engage in playful discussions about various shapes such as squares, rectangles, triangles, and circles. The story concludes with them enjoying snacks and realizing that shapes are everywhere, not just in their toys and bikes.