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    Lawrence Hall of Science
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    In this activity, learners get a closer look at the shape of a drop of water and a drop of oil. Learners first drip water onto wax paper and examine the shape of separate drops from a side view....

    1 cent - $1 per group Ages 6 - 14 10 to 30 minutes
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    WGBH
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    This simple construction activity teaches the importance of architectural structure. Learners build and test designs for a paper "doghouse" strong enough to hold the weight of a jumbo dog...

    1 cent - $1 per student Ages 6 - 11 45 to 60 minutes
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    New York Hall of Science
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    Investigate a flower's power of marketing by making an imitation flower that successfully signals a bee (or other pollinator of your choice) to visit. Try to determine what characteristics...

    1 cent - $1 per student Ages 4 - 11 5 to 10 minutes
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    University of Kansas
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    In this activity, learners determine the shape of an unseen object by bouncing a ball off the object. Learners analyze how the ball hits the object (the angle at which it strikes the surface) to...

    1 cent - $1 per group Ages 8 - 14 45 to 60 minutes
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    Oregon Museum of Science and Industry
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    In this activity (on pages 41-47 of PDF), learners explore tesselating geometric patterns (repeated shapes, similar to the art of M.C. Escher). They play with existing shapes, either with laminated...

    1 cent - $1 per student Ages 4 - adult 45 to 60 minutes
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    Lawrence Hall of Science
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    In this activity, learners observe mixtures of sand samples glued to note cards, and consider how sand can differ in size, shape, and color, and where it comes from. The goal is to help learners...

    1 cent - $1 per group Ages 4 - adult 10 to 30 minutes