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In this trick, hold your hand over a burning candle without getting burned, by reflecting and transmitting the light of two candles. This activity is best suited as a demonstration.

$1 - $5 per group Ages 8 - 18 5 to 10 minutes
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In this activity, learners recreate a method of detecting and correcting errors in computers called 'parity'.

1 cent - $1 per group Ages 6 - 18 5 to 10 minutes