Spin the disk and enjoy a hypnotic light display with ever-changing sound. The disk seems to spin forever, rotating and precessing as it slowly transforms gravitational potential energy into kinetic energy. The concave mirror base reflects the disk's spectacular effects. Amazing to use in a darkened room with a flashlight or laser. Includes magnetic holographic film for extra dazzle. 7.5 cm (3 inch) dia. disk, 20 cm (~8 inch) dia. mirror.
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Work great, loved it.
Oct 21, 2016 | By David of Surfside, FL United States
Aug 5, 2016 | By Kathy of Saugerties, NY United States
Wow - It's fab!
Mar 20, 2016 | By Kerryn of Melbourne, NY Australia
Mar 17, 2016 | By Dirk Schrontz of Lafayette, IN United States
Euler Disk from the point view of fix sampling
Aug 6, 2013 | By TKHou of HsinChu, Taiwan
Fun and Good Quality
Dec 14, 2012 | By Molly of Pittsburgh, PA United States
For the grandkids
Oct 21, 2012 | By Buzzy Crawford of Wildwood, GA United States
Aug 29, 2012 | By Martin O'Connell of Bangor, ME United States
Goes on a long time
Aug 28, 2012 | By Allan of Las Vegas, NV United States
Aug 27, 2012 | By Ruben Lopez of Largo, FL United States
Jun 9, 2012 | By Don Stokes of DeKalb, MS United States
May 23, 2012 | By Martin Roy of St-Georges, QC Canada
May 22, 2012 | By Mark Everson of Farmington, NM United States
May 17, 2012 | By Paul of Charlotte, NC United States
May 16, 2012 | By Jerry Hornak of New Preston, CT United States