This is a wonderful puzzle trick and all-around fascinating prop. Molded from plastic, the box can be used as a receptacle where borrowed items are trapped inside with no way to get them out.
For those interested in puzzles, the box can be used in bar bet situations, as a challenge (get a dollar bill out of the box and you get to keep it, and so on) or as a conversation piece in the home.
The Crystal Treasure Box is completely clear - so the spectators can see what's inside but won't be able to get the item out. Yet to those who know the secret, opening the box to remove or replace items is simple.
Each unit comes complete with routines and detailed directions.