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50 stick blocks
What's in the kit
Octyldodecanol
wipe with damp cloth or toy disinfectant
9 pieces of felt
Build a Doorbell DIY maker kit Material_Fabric 50 stick blocksMake your own doorbell, perhaps for your bedroom, with this kit from Koa Koa. An exciting way to learn about gearing and friction, this kit includes everything you need to make a working doorbell. Koa Koa is passionate about the maker movement, and their kits are aimed at inspiring children to use their hands and minds to learn and create. What will you learn? The different types of gears: gear trains, rack, pinion, circular, etc. The ratios to
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