With this small, transparent box you can lead everybody up the garden. Slip, unnoticed, a borrowed valuable inside (a ring, a banknote, you name it) and hand it to a spectator with the instruction to open the box, without breaking it of course. No matter how hard he tries, it's no good. Needless to say you have it open in a trice.

Ingeniously designed. 'Treasure Box' measures 8x5x4 cm) and is completely transparent.