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In this activity, learners build water-propelled engines from soft drink cans.

$1 - $5 per group Ages 4 - 14 30 to 45 minutes
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In this activity about the relationship between food and energy (page 5 of PDF), learners conduct an experiment to compare how much energy is released as heat from two different foods.

$1 - $5 per group Ages 8 - 14 45 to 60 minutes