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Review highlights
Recommended by our customersEuler's Disk
By eston5862
A fun science demonstration of kinetic energy, low friction and reflective light. I first seen it on the Big Bang Theroy... see all reviews
Verified PurchaseGreat product!
By poopship
I bought this for my mom for her birthday. She's been a rock collector for a long time. I haven't seen her soooo excited... see all reviews
Verified Purchase
