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What is the Structure & Properties of Matter? |
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Our Earth in the Solar System |
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$695.00 |
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What is the Life Cycle of a Butterfly? |
$225.00 |
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$225.00 |
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What is Weather? |
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Does Water Mix with Sand or Dirt? |
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Why do Animals Start as Eggs? |
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What are Magnetic Fields? |
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$225.00 |
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