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In this experiment, learners use JOY liquid detergent and glycerin to make the largest bubble they can that lasts 15 seconds.

Over $20 per group Ages 4 - adult 10 to 30 minutes
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In this playful physics activity (page eight of the pdf), learners use toy cars to explore how speed and weight affect the results of collision.

1 cent - $1 per group Ages 8 - 11 10 to 30 minutes