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What are Complex Machines? |
$225.00 |
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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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Can we Design New Machines? |
$225.00 |
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$225.00 |
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Can we Dig for Fossils? |
$225.00 |
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$225.00 |
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What is a Camera? |
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$225.00 |
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What Lives in a Pond? |
$225.00 |
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$225.00 |
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