The Wonder Demon Box has been produced in many forms over the years.  This great little version has a load chamber that will take several silks, a single 3″ sponge (or multiple smaller size), or any other small compressible items you can think of.

The performer opens all sides and the lid of the box to show that there is nothing inside.  They then close all the doors, re-open the lid and start to remove items from the previously empty box. Easy to perform and a great little item.

This comes on a single sheet of 3mm birch ply with full instructions for the building and performance along with sandpaper, glue and wax to help with the construction.