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It used be 3 1/2 in floppies now it is CD's. We have plenty of them
lying around thanks to AOL and other sources. They look neat.
What kind of uses have Phys-lers found for these CD's?
1. Diffraction grating
2. Hovercraft
3.Wheels for mousetrap cars.
4. Coaster for my teacup
Any other?