It is much easier to build than the earlier version

Fun addition to any HO train set

128 speed steps

This is a NCE 0173 D13SR Decoder (Pack of 10)

THAMES & KOSMOS 665067 Physics Discovery Experiment Kit ProductNumber2_363 It is much easier toThis 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