Brand: Koa Koa
Description: This DIY kit will allow you to build a beautiful doorbell for your room. While building it, you will discover gear trains and basic mechanical principles like the friction effect.
Includes: Three large wooden gears, a large board and small parts to assemble. There are also screws and nuts: nuts, screws, rings, washers, wing nuts.
Suggested Ages: 6 and up.
