Make a Handcrank Doorbell
What will you learn?
- The different types of gears: gear trains, rack and pinion, circular, etc.
- Ratios to calculate the speed at which gears turn
- The friction effect, the crank
Includes: 3 large wooden gears, a large board and small parts to assemble. There are also screws and nuts: nuts, screws, rings, washers, wing nuts, a hair band and a bicycle bell.
Suitable for children aged 8 years and older
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