How do I balance a coin on a floating lemon

A coin cannot be balanced on a lemon in a glass of water without it falling off, because the coin is denser than the lemon. Cut a slit into the lemon, wedge a coin inside, and place the lemon into water. With a coin stuck in the lemon, the lemon will roll over to get into a more stable position. The coin will always remain at the bottom allowing the lemon to maintain its centre of gravity.

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Updated on Sunday, February 05 2012 at 01:21PM GMT

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Collections: index finger, coin, thumb, lemon