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In this math activity, learners play a game similar to 20 Questions, in which learners must identify a secret number drawn from a bag.

1 cent - $1 per group Ages 4 - 8 5 to 10 minutes
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In this math activity, learners play a number game to explore the relationships between numbers, combinations, and the concept of equivalency.

1 cent - $1 per group Ages 8 - 11 5 to 10 minutes
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In this math activity, learners estimate how many pennies are in a jar by predicting and counting handfuls of pennies.

$1 - $5 per student Ages 4 - 8 5 to 10 minutes
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In this activity, learners will keep track of how much they can do in one minute. Instructors can pick something everyone will do for a minute, such as jumping up and down or drawing stars.

free Ages 4 - 14 5 to 10 minutes
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This is an activity in which learners will find that they can detect differences in concentration better with their nose (smelling) than with their eyes (seeing).

$5 - $10 per group Ages 4 - adult 5 to 10 minutes
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This quick demonstration (on page 11 of PDF) allows learners to understand why scientists think water ice could remain frozen in always-dark craters at the poles of the Moon.

$1 - $5 per group Ages 6 - adult 5 to 10 minutes