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Amazon.com: K'nex Beginner 40 Model Building Set - 141 Parts - Ages 5 & Up - Creative Building Toy, Multi, 141 K'NEX Parts and Pieces,Includes Instruction Booklet : Toys & Games
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Amazon.com: K'NEX 70 Model Building Set - 705 Pieces - Ages 7+ Engineering Education Toy (Amazon Exclusive) : Toys & Games
Amazon.com: K'NEX 100 Model Imagine Building Set (Amazon Exclusive), for 7 - 10 years : Toys & Games
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Amazon.com: K'nex Beginner 40 Model Building Set - 141 Parts - Ages 5 & Up - Creative Building Toy, Multi, 141 K'NEX Parts and Pieces,Includes Instruction Booklet : Toys & Games
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