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    The Exploratorium
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    This is an activity that demonstrates how batteries work using simple household materials. Learners use a pickle, aluminum foil and a pencil to create an electrical circuit that powers a buzzer....

    $5 - $10 per group Ages 11 - 18 30 to 45 minutes
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    NRICH
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    In this game, learners build up six stacks of cards in the middle of the table, face up, in order from 1 at the bottom to 20 on the top. The first player to get rid of all his cards is the winner....

    1 cent - $1 per group Ages 6 - 11 5 to 10 minutes
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    Pratt School of Engineering, Duke University
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    Each learner chews a piece of gum until it loses its flavor, and then leaves the gum to dry for several days. By weighing the gum before and after chewing, they can determine the amount of mass...

    $1 - $5 per group Ages 11 - 14 2 to 4 hours
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    The Exploratorium
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    In this activity about electricity, learners explore what happens when you blow a fuse. Learners short-circuit a battery using copper wire (a good conductor with very low resistance) and thin iron...

    $1 - $5 per student Ages 8 - 14 10 to 30 minutes
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    Lawrence Hall of Science
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    Learners imagine a world covered in a mysterious substance called Oobleck. Learners make this substance and investigate its properties. Using an online program, they then design a spacecraft that...

    $1 - $5 per group Ages 8 - 18 30 to 45 minutes
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    Colorado State University
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    In this activity, learners explore conservation of energy by experimenting with a solar cell light device. Learners will set the solar cell in the sun for varying times to charge the battery and...

    $1 - $5 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 chemistry activity, learners prepare two petri dishes, one filled with water and one filled with milk. Using food coloring and soap, they discover that milk is an emulsion, a special...

    $1 - $5 per group Ages 4 - 18 5 to 10 minutes
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    American Chemical Society
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    Learners compare the weight of equal volumes of wax, water, and clay. Learners discover that since the wax weighs less than an equal volume of water, it is less dense than water and will float. And...

    $1 - $5 per group Ages 8 - 14 30 to 45 minutes
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    Children's Museum Of Houston
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    In this activity about problem-solving, learners build a house for the Three Little Pigs using twenty straws and two index cards. Learners then use a fan to simulate a tornado and shake the table...

    $1 - $5 per student Ages 8 - 11 10 to 30 minutes
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    American Physical Society
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    Learners experiment to see which colors of light will cause a phosphorescent (glow-in-the-dark) material to glow. Different colors of light have different wavelengths, and different amounts of...

    $10 - $20 per group Ages 11 - 14 10 to 30 minutes

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