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    Smithsonian Center for Education and Museum Studies
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    In this online interactive challenge, learners choose items to represent the Earth or solar system, then determine other items to represent the Moon, or Milky Way based on their relative size. The...

    free Ages 8 - 18 10 to 30 minutes
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    American Association for the Advancement of Science
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    In this online activity, learners can test their skills at finding constellations in the northern hemisphere's night sky. Learners can choose during which season to look, and then look for...

    free Ages 8 - 11 10 to 30 minutes
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    University of Washington
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    In this activity (7th activity on the page), learners use their sense of touch to identify mystery objects hidden in socks. Learners guess what is inside by touching and feeling the object on the...

    free Ages 4 - 18 5 to 10 minutes
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    The Exploratorium
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    This is an online exhibit about color perception. Learners set a random background color and then try to mix red, blue, and green light to match. Although this is a perception activity, it also...

    free Ages 6 - 18 5 to 10 minutes
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    Science Museum of Minnesota
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    In this interactive game, learners will test their memory of animal and insect sounds. Flip over cards, listen to the sound, and try to find the ones that match. Three levels of play ranges from...

    free Ages 4 - 14 5 to 10 minutes
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    COSI
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    This is an online activity about simple machines. Learners will try their hand at putting these amazing devices to work. They will use several simple machines to help "build" a tree house...

    free Ages 8 - 14 5 to 10 minutes
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    American Museum of Natural History
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    Learners work in teams to investigate how scientists use physical characteristics to classify living things. First, learners examine drawings of a variety of leaves from different species of oak...

    free Ages 8 - 18 45 to 60 minutes
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    The Exploratorium
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    In this hands-on activity, learners make the world's simplest Cartesian diver, using only a plastic bottle, some water, and a condiment packet. A Cartesian diver is a classic science...

    free Ages 6 - adult 5 to 10 minutes
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    University of Washington
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    Use this activity (10th on the page) to help learners explore memory and how sometimes your brain makes up its own memories. Learners will read and try to remember the words in list #1. Five...

    free Ages 8 - 18 5 to 10 minutes
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    COSI
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    In this mathematics activity, learners use a map to determine the coordinates of and distance between two locations--both by road and "as the crow flies". They account for any differences...

    free Ages 8 - 11 10 to 30 minutes

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