Inclined Planes
Buy from $13.72
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Watch an Apple Grow
Buy from $10.68
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Eating Healthy
Buy from $16.79
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Watch a Pumpkin Grow
Buy from $20.43
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The Lincoln Memorial
Buy from $15.43
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Watch a Strawberry Grow
Buy from $673.67
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Turtle or Tortoise?
Buy from $15.09
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Thunderstorms
Buy from $28.27
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Watch an Orange Grow
Buy from $20.53
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Bee or Wasp?
Buy from $11.39
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Wheels and Axles
Buy from $9.50
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Cheetah or Leopard?
Buy from $19.90
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The Liberty Bell
Buy from $8.97
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Watch a Bean Grow
Buy from $21.80
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Moose or Elk?
Buy from $35.56
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Swan or Goose?
Buy from $35.99
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Watch a Banana Grow
Buy from $9.99
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Jury Duty
Buy from $18.73
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The Pledge of Allegiance
Buy from $10.98
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The Bill of Rights
Buy from $10.30
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Getting Sleep
Buy from $18.75
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Wolf or Coyote?
Buy from $35.57
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President
Buy from $28.27
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Watch an Oak Tree Grow
Buy from $20.14
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