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    WGBH
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    In this dynamic activity, learners build a catapult that launches projectiles, such as marshmallows. Participants then design and build their own models using the steps of the design process to...

    1 cent - $1 per group Ages 6 - 11 30 to 45 minutes
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    WGBH
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    Learn how to make and fly a paper helicopter! This simple activity includes a template (for the copter "blades") and instructions for folding, flying, and testing designs. Students will...

    1 cent - $1 per student Ages 6 - 11 10 to 30 minutes
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    WGBH
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    In this activity, learners use mirrors to write secret messages to a friend. Use this activity to explore letters, optics, and/or symmetry.

    1 cent - $1 per student Ages 6 - 11 5 to 10 minutes
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    NISE Network
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    In this activity, learners mark their height on a height chart and discover how tall they are in nanometers. They learn that although being a billion nanometers tall sounds impressive, it doesn&...

    1 cent - $1 per group Ages 4 - adult 5 to 10 minutes
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    WGBH
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    In this simple activity, learners discover how a mere piece of paper can be used to hold up the weight of a heavy book. Learners are encouraged to modify their materials, using the steps of the...

    1 cent - $1 per student Ages 6 - 11 10 to 30 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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    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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    University of Nebraska State Museum
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    In this activity (on pages 23-29), partners use the Plant Traveler Cards, along with a world map and map worksheets, to follow plants such as cassava, chocolate and coffee that grew first in one...

    1 cent - $1 per group Ages 8 - 14 45 to 60 minutes
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    Lawrence Hall of Science
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    En esta actividad sobre la densidad de los líquidos, los participantes ven si las gotas de colorante se hunden en diferentes soluciones de agua. Mezclan agua con sal o azúcar y observan el...

    1 cent - $1 per group Ages 8 - 11 10 to 30 minutes
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    Lawrence Hall of Science
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    En esta actividad, los aprendices experimentarán con las tres fases del agua. Intentarán controlar la rapidez de los cambios de estado al manipular la temperatura y la presión del agua, hielo, y gas.

    1 cent - $1 per group Ages 4 - 8 10 to 30 minutes

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