And it works no matter which disk they choose!
The routine is simple: let your spectator choose any one of the four different color disks. The disks are placed in the four corners of a case with a clear lid.Turn the case over, then turn it right side up again- their disk has vanished!Then turn the case again- and their disk is BACK inside the case!Very, very easy to do- NO SKILL NECESSARY!
And if you have a bit more skill with sleight of hand, you can make the disk vanish from the case, and appear anywhere else you choose!
You get a lot of bang for your buck with this great pocket effect!
And that's all you need!