When a mysterious box shows up in the backyard of the Blue's Clues house, Steve is disappointed to find that it's empty, but Blue shows him that by using imagination, the box can be anything one pretends it to be. We use this idea to have a lot of fun, pretending that the box is anything from a car to a rocketship. Shovel and Pail manage to get three different uses out of it. We even use it to make it to the top of a high tower in the Blue Skidoo segment.