This is the classic Rattle Bars routine done with chewing gum packets. The packets have a magnetic system built in which allows you to make them rattle with a piece of gum (like candy) or stop completely.

Basic routine: You place two empty packs of chewing gum on the table and between them a third in which a last piece of gum can be heard rattling.

You switch the packs around and ask the spectator to guess which pack has the piece of gum. 

Whatever they guess is wrong (or right, up to you). This can be repeated many times. As a finale all the packets are empty (not rattling) and examinable.

Manufactured in Hungary by Joker Magic. You get three magnetically gaffed chewing gum packets and written instructions.

NOTE: Limited Quantity. Warehouse find.