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What is DNA? |
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What is the Science of Static Electricity? |
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$225.00 |
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How do Electric Motors Work? |
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$225.00 |
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Why are Molecules Attracted to Each Other? |
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$225.00 |
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What is the function of Wheels, Pulleys, and Gears? |
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$225.00 |
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What Makes a Bubble? |
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$225.00 |
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What Makes You You? |
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$225.00 |
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