A complete set of all the bricks you need plus extras, as well as plans so you can build a fully-working doors illusion at home.

Effect:

The magician shows a toy building-block box all around, and then opens the doors front and back to show that it is empty. Closing the doors, the magician instantly re-opens them to reveal that a mini-performer has appeared inside the box! No sleight of hand necessary.

A real fooler!