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A classic wooden water wheel spins in a flowing stream attached to the side of a rustic stone mill building.
High in the sunny hills, a cheerful stream flows past a cozy stone mill. Along the side of the building sits a magnificent wooden water wheel, full of spokes and sturdy paddles. This amazing wheel is one of history’s greatest inventions! It shows how people use the power of moving water, known as hydropower, to do heavy work.
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A friendly robot with a glass dome head and tank treads works at a lab bench, carefully adding liquid into an intricate set of spiraling chemistry tubes.
A helpful little robot uses metal tongs to carefully place a block of dry ice into a bubbling beaker during a science experiment.
A friendly, blocky robot with small solar panels for wings carefully uses a wrench to adjust the brass gears of a mechanical model of the solar system.
A friendly robot uses a tiny watering can to care for small plant sprouts growing inside three glass test tubes.
A friendly science robot with a glass dome head carefully organizes petri dishes on a laboratory workbench.
