My kids get something from rom Toys R Us that they've spent months longing for and then spend five minutes with it before getting bored. But give them a cast-off box and the possibilities are endless!
This one, from my recent ergonomic chair purchase has been a robot, a toy cart, and a slide, among other things. My favorite use of the cardboard has to be what they call the “Luxury Box” created as a TV-watching base. They take turns being on the first or second floor.
They loved it so much they wanted to eat dinner in/on it, so I indulged them, "Luxury Box" style. Becasue it won't be long before the aperture narrows on their eye for possibility and a big box loses its magic.