Make a Handcrank Doorbell counted Also pictured as part of

Also pictured as part of our collections of unique home decor

112 pages -Written by Knock Knock

Size: diameter: 14

Sizes 12"H x 6"W x 5"D

Make a Handcrank Doorbell counted Also pictured as part ofThis 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. You will manipulate nuts, screws, washers, etc. Each step is clearly explained in the booklet. You will discover many kinds of gears and their function in the objects around us. How does it work? First, detach the gears from the wooden boards, then identify all the small