Toysmith Euler's Disk Science and Learning Kit (G051168017096), Silver steel

CONNEXITY

Toysmith Euler's Disk Science and Learning Kit (G051168017096), Silver steel

Fascinating Desktop Illusions. Spin the holographic disk on the mirror. Does it speed up. Listen to its rhythmic sounds. Why does the humming get louder as the speed of the disk increases. This patented 3-inch diameter chrome-plated steel disk creates...