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Gearbell Workshop
On the night before the big holiday, Marigold, a twinkly-eyed old otter inventor, needs a new apprentice engineer. Children set real parts and test them: stack ramps, slide a lever's fulcrum, choose pulley strands, build gear trains, time a cam and a conveyor, and sort presents by size. Every test runs a simple physics model, so a miss shows why and the next try improves. Finally they chain every machine into one contraption that launches the sleigh over the glowing village.
ages 7–11 · about 25 min
What you'll learn
- Ramps: steeper is faster, wheels beat sliding friction, and longer ramps need less push
- Levers: moving the fulcrum, and balancing weight × distance on both sides
- Pulleys: more rope strands share the load, but you pull more rope
- Gears: big and small gears change speed, and every mesh flips the direction
- Cams, conveyors and sorting: timing machines so they work together