This is a Chooch Enterprises 7244 Oil Pipe Connector Load

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128 speed steps

Fun addition to any HO train set

THAMES & KOSMOS 665067 Physics Discovery Experiment Kit ProductNumber2_363 This is a Chooch EnterprisesThis is a Thames & Kosmos 665067 Physics Discovery Experiment Kit. Construct 12 models and conduct experiments with them to learn about forces and simple machines. Each model demonstrates a fundamental idea in mechanical physics. For example, you can build a balance scale to learn about lever arms, a freight elevator to learn about pulleys, and a bicycle to learn about wheels. Construct a spinning motion picture machine to learn about centripetal and