Type "antigravity invention" in Google and you'll likely end up with this site called antigravitycup.com which shows a piece of styrofoam floating inside a plastic cup - apparently defying gravity.
While it's most likely a trick of static, it's still fun to watch and anyone can challenge themselves to replicate the trick. It is quite possible to do yourself if you know what to do. But we'll not spoil the fun for you.
For more science experiments and science fair ideas, go to Science Fair Projects and Ideas.
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