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What is the Life Cycle of a Butterfly? |
$225.00 |
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What Makes a Year? |
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$225.00 |
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What is Filtration? |
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$225.00 |
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What Happens to Water in Winter? |
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$225.00 |
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Energy |
$695.00 |
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$695.00 |
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Forces & Interactions |
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$695.00 |
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What makes a Boat float? |
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$225.00 |
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What are Phase Changes? |
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$225.00 |
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