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Euler’s Spinning Disk
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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? Complete with instructions and the scientific answers!
 Gift Wrap Available
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Customer Reviews
Overall Rating:   and share your thoughts with other customers Sort Reviews: Newest | Oldest | Highest Rating | Lowest Rating - Monday, April 13, 2009 It's great!!! Reviewed By: Lindi (Brigham City, Utah) This is a replacement for one that we've had for over 10 years. We love it! Read More Reviews |
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