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    Mensa Education & Research Foundation
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    In this activity on page 3 of the PDF, learners discover how science and Halloween are fun companions as they make paper bleed. Learners use an ammonia solution to make a "bloody"...

    $10 - $20 per group Ages 6 - 14 5 to 10 minutes
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    New York Hall of Science
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    Make your own mummy! Using a combination of salts, transform an apple into a mummy and discover how the Ancient Egyptians used drying as one step in the mummification process. Note: The...

    $1 - $5 per student Ages 6 - 14 1 to 4 weeks
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    Oregon Museum of Science and Industry
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    In two separate bags, learners mix water with Epsom salts and detergent. They discover that one mixture becomes cold (dissolving is an endothermic process), and one becomes hot (dissolving is an...

    $1 - $5 per group Ages 6 - 14 10 to 30 minutes
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    Oregon Museum of Science and Industry
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    Learners mix a solution of luminol with hydrogen peroxide to produce a reaction that gives off blue light. Learners discover that some chemical reactions release energy in the form of light, and...

    $1 - $5 per group Ages 4 - adult Under 5 minutes
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    Sciencenter
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    In this chemistry challenge, learners identify an unknown white powder by comparing it with common household powders. Learners first explore what happens when baking soda, baking powder, and...

    Over $20 per group Ages 4 - 14 10 to 30 minutes
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    Sciencenter
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    In this chemistry challenge, learners combine acids and bases in a universal indicator to create five different colors. Using vinegar, washing soda, and Bogen universal indicator, the goal is to...

    Over $20 per group Ages 4 - 14 10 to 30 minutes