Leopold's new bike makes him the envy of every kid in town, well, almost every kid. While Leopold is busy showing off his bright-red bike, with its loud bell and thunderbolt decal, imaginative and kindhearted Kobe plays in a box and pays no attention to the new bike. Leopold gets angry when he runs into Kobe's box while riding his bike, but he soon learns that the box can take the kids on the playground places that Leopold's bike never could-jungles, race tracks, and the sky! By the end of playtime, Leopold learns the value of imagination, friendship, and cooperation.