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    WGBH
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    In this activity, learners use tinfoil to build and test their own boats - which designs will float, and which will sink? Learners must adjust many variables in their boat design to maximize...

    1 cent - $1 per student Ages 6 - 11 45 to 60 minutes
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    WGBH
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    In this activity, learners construct a playable kazoo from inexpensive materials. They will experience how vibration creates sound waves and music. Changing the materials their kazoo is made of,...

    1 cent - $1 per group Ages 6 - 11 10 to 30 minutes
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    Lawrence Hall of Science
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    In this activity, learners build a bird feeder or feeders to attract birds for observation. The main feeder to be built is made from a large milk carton, but a suggestion is also included for a...

    $1 - $5 per group Ages 6 - 14 30 to 45 minutes
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    Children's Museum of Indianapolis
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    In this activity, learners explore what makes a boat float and sink. They examine and test various objects to determine why objects float or sink. This experience can prepare learners for a science...

    $5 - $10 per group Ages 4 - 8 45 to 60 minutes
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    WGBH
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    This fun activity uses simple materials such as milk cartons and mirrors to introduce the ideas of optics and visual perception. The project is easy to do, however adult assistance may be needed to...

    $1 - $5 per student Ages 6 - 11 10 to 30 minutes
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    Lawrence Hall of Science
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    In this outdoor activity, learners build bird nests and place them in the activity area, then play the role of naturalists as they try to locate each other's nests. Learners consider how bird...

    $1 - $5 per group Ages 6 - 11 45 to 60 minutes
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    Aquarium of the Bay
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    In this activity (page 2 of pdf), learners craft a model of a skate egg case and come to understand that cartilaginous fish such as sharks and shakes employ reproductive strategies that differ from...

    1 cent - $1 per student Ages 6 - 11 1 to 7 days
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    NASA
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    In this activity, learners build water-propelled engines from soft drink cans. Water flowing out of holes in the can cause the can to rotate in the direction opposite to the stream, explained by...

    $1 - $5 per group Ages 4 - 14 30 to 45 minutes
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    Lawrence Hall of Science
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    In this activity, learners construct models of plants that are adapted to living under specific environmental conditions. As they make their models, learners consider what adaptations help plants...

    $10 - $20 per group Ages 6 - 14 45 to 60 minutes