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Height: 2"
Set Collar
nicknamed 'The Quiet One
This 3-car set is ideal for modelers recreating early 1900s through transition-era railroading on their HO scale layouts
Thames & Kosmos Saltwater Fuel Cell Robot STEM Experiment Kit 550065 On30 Scale Height: 2"Build a sleek, modern (and adorable!) walking robot powered by salt water and magnesium no batteries required! Discover how a metal air electrochemical cell stores and discharges electrical energy using a simple saltwater solution. Explore the science of electricity, currents, and electric potential. An innovative pump mechanism provides a steady drip of salt water onto the magnesium plates and the robot walks for up to one hour on just one drop of
