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Klutz LEGO Gravity Drop - Books for Ages 8 to 12 - Fat Brain Toys. Explore the science of chain reactions with the power of LEGO! You'll start by building an 18-inch tower full of LEGO contraptions including twists, turns, ramps, spinners, a funnel, and more. Then, explore all kinds of activities and learn about the... - Klutz LEGO Gravity Drop - Books for Ages 8 to 12 - Fat Brain Toys. | | $29.95
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