This is the first "creation in the Klutz lego Chain Reactions book Already teaches about axels ramps friction etc! Takes about 10 min… | Lego camp, Lego, Inventions
LEGO CHAIN REACTION KINETIC KIT
Lego Chain Reactions by Pat Murphy and Scientists of Klutz Labs 9780545703307 | eBay
LEGO® Chain Reactions : Design and Build Amazing Moving Machines from Klutz Labs | eBay
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Amazon.com: LEGO Chain Reactions (Klutz Science/STEM Activity Kit), 9" Length x 1.06" Width x 10" Height : Pat Murphy and the Scientists of Klutz Labs: Toys & Games
LEGO CHAIN REACTION KINETIC KIT
LEGO Chain Reactions | MindWare
Klutz LEGO® Chain Reactions – To The Nines Manitowish Waters