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Koa Koa

Koa Koa: Build a Hand Crank Doorbell

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 A simple, fun and effective kit to get your little engineer thinking about gears and cause and effect!

This kit contains everything you need to build a doorbell for your bedroom. Once assembled, turn the crank: the gears engage the hammer which strikes the bell. Decorate it to your liking. Includes booklet introducing different types of gears.

6 years and up recommended