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    The Exploratorium
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    This activity about density provides instructions for making a miniature "lava lite" with just salt, oil, water, and food coloring. This crowd-pleasing experiment is a hands-on and...

    1 cent - $1 per student Ages 4 - 8 10 to 30 minutes
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    WNET
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    In this fun hands-on activity, learners whip up a batch of cyber-dough (play dough) using math for measurements. The amount of salt is given, but the learner needs to figure out how much flour (4...

    $1 - $5 per student Ages 4 - 11 30 to 45 minutes
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    Oregon Museum of Science and Industry
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    This is a recipe for playdough made by mixing household ingredients and cooking it in a microwave. This recipe includes suggestions for artistic embellishments to enhance the sensory experience,...

    $1 - $5 per group Ages 4 - 11 30 to 45 minutes
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    Institute of Physics
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    This is a highly visual demonstration that illustrates both the effects of density and chemical reactions. Like a density column, volcano eruption, and Alka-seltzer reaction all in one, learners...

    $1 - $5 per group Ages 4 - adult 5 to 10 minutes
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    Oregon Museum of Science and Industry
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    Learners observe and compare the sizes of three toy “growing” crocodiles made from water-absorbent polymers. One is it its original state, dry, hard, and about 10cm long. One is immersed in salt...

    $5 - $10 per group Ages 6 - adult 1 to 7 days
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    Kohl Children's Museum
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    In this activity, learners follow a recipe to create play dough scented with fruit-flavored drink mix. As they mix together the ingredients, learners are encouraged to use descriptive words to...

    $1 - $5 per group Ages 4 - 8 30 to 45 minutes
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    Twin Cities Public Television
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    In this technology activity, learners light up the room with electrifying play dough creations. Learners use conductive and insulating homemade play dough to build simple circuits. Learners then...

    Over $20 per group Ages 8 - 14 1 to 2 hours