Bored? Why not sit around and strike these mysteriously cool Flash Rocks together. When struck together a bright flash of light occurs at the point of impact, a phenomena known as Triboluminescence. That's all they really do, but at least you won't need to buy any batteries! You get 3 pairs of these strange rocks for you and your coworkers to play with.
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Features
- Mystery of science
- Strike the rocks together in a darkened room to generate a flash of light at point of impact
- Triboluminescence - flash of light that occurs when 2 particular substances are struck together
- Includes 3 pairs of flash rocks
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