Euler's Disk: Magnetic Science Kit

Euler's Disk is a 1/2 inch thick, 3 inch wide, chrome plated steel disk. One edge is carefully machined to a smooth radius. 9 pieces of magnetized holographic foil make a variety of brilliant surface designs. A concave mirror base provides a setting for the disk to spin on like a coin... a coin that doesn't seem like it will ever stop! Hold the disk upright, slightly angled onto its rolling edge, and give it an easy twist. That's all there is to it. The rest is a combination of science, magic, and an increasingly compelling sonic hum. Use any combination of holographic film on top of the disk and/or a flashlight to enhance the visual effect of Euler's Disk. For ages eight and up.