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    National Optical Astronomy Observatory
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    This is a classic exercise for visualizing the scale of the Solar System. Both the relative size and spacing of the planets are demonstrated in this outdoor exercise, using a mere peppercorn to...

    1 cent - $1 per group Ages 6 - adult 45 to 60 minutes
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    Aquarium of the Bay
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    In this multi-step experiment (page 4 of pdf), learners study tide pools, and then drop a "wave" (a 4-pound bag of beans or birdseed) on a shell to mimic the force of crashing surf on...

    1 cent - $1 per student Ages 8 - 11 45 to 60 minutes
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    Optical Society of America
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    In this optics activity, learners make a lens and explore how the eye manipulates the light that enters it. Learners use a shoebox, a glass of water, and colored plastic to make essentially a model...

    1 cent - $1 per student Ages 8 - 14 5 to 10 minutes
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    Integrated Teaching and Learning Program, College of Engineering, University of Colorado at Boulder
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    Learners make a skydiver and parachute contraption and launch it. They see that the drag created by air resistance slows the descent of skydivers as they travel back to Earth. This activity can be...

    1 cent - $1 per group Ages 11 - 18 30 to 45 minutes
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    BioEd
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    This activity helps learners visualize the Human Immunodeficiency Virus (HIV) by constructing three-dimensional HIV particle models from paper. The model to be used is a 20-sided polyhedron ...

    1 cent - $1 per student Ages 8 - 18 1 to 2 hours
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    The Exploratorium
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    In this activity, learners build bridges using paper and explore how much weight each bridge design can support. There is an element of surprise, which increases learners' interest in the...

    1 cent - $1 per group Ages 4 - 11 45 to 60 minutes
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    American Association for the Advancement of Science
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    Teams of learners use a series of stick figures made from pipe cleaners to model a dance routine. Then, they use this model to communicate to another learner who performs the dance routine. This...

    1 cent - $1 per group Ages 8 - 11 10 to 30 minutes
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    University of Washington
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    In this activity, learners create a model of a neuron by using colored clay or play dough. Learners use diagrams to build the model and then label the parts on a piece of paper. This resource guide...

    1 cent - $1 per student Ages 8 - 18 10 to 30 minutes
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    New Jersey Institute of Technology
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    Using paper, paper clips, an index card, and tape, teams of learners design flying devices to (1) stay in the air as long as possible and (2) land as close as possible to a given target. Teams will...

    1 cent - $1 per group Ages 11 - 14 45 to 60 minutes
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    NSBRI
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    In this activity about living things and gravity (page 5 of PDF), learners design and build an exoskeleton or an endoskeleton for an animal of their own invention. Learners consider their animal&...

    1 cent - $1 per group Ages 6 - 11 1 to 2 hours

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