YOUR HEAD ACTUALLY LOOKS LIKE IT IS INFLATING LIKE A BALLOON! The magician displays a small 5.75 inch, specially made spiral steel disk; imagine the kind a hypnotist might use. The spiral is spun on the table top and you instruct the audience to stare at the spiral and not look away. You start to count backwards from 10 to 1, and when you reach one, you tell the audience to look at your nose. YOUR HEAD BEGINS TO GROW LIKE A BALLOON BEING INFLATED! Every audience will want you to do it again so this time you have the audience select a partner. Spin the disk the other way, and when they look at their partner THEIR PARTNER'S HEAD BEGINS TO SHRINK! The spiral can be carried in your pocket. It is perfect for table hopping and strolling . Spiral Steel Illusion Diameter Approximately 5.75 inches. No instructions, just spin, stare at it for 10 seconds, then look at something!