| Gear up! Build the three different gears -- spurs, crowns and sockets. With the K'Nex Gears and Cranks set lets you investigate gearing up and gearing down, increasing speed and increasing force. You will learn about basic mechanical concepts and how they are used in real world applications. The models demonstrate two spur-gear examples, two crown-gear examples and two sprocket-gear examples. Set includes building instructions with photos and key facts and comes packaged in a strong plastic storage case with dividers. Includes 198 K'Nex pieces.
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