$6.65
Try to figure out how to take the coin out from the key chain, the solution is simple and related to the laws of motion!
Specification
| Dimension | ø 4.8 x 0.5 cm |
|---|---|
| Material | acrylic, stainless steel |
| Made in | China |
Yellow：may the centrifugal force be with you
Blue：science is magic that works
Red：spreading love as centrifugal force
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