Essential Mechanisms. 3:1 Gear Box The third project in my

Essential Mechanisms. 2:1 Gear Box The second project in my

Dinosaur. Download and make. New to the website is this

Win the Original Hippo Model I've bought a sturdy box

Hippo. Download and make. Turn the handle, the gears mesh

Kickstarter fun! I’m excited to say that I have a

Ski Rex! Double Crank Disagreeing Dog Paper Bird Get your

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Tasty Watermelon A mouth-watering paper treat for everyone to download

Cow Jump! Download and Make. Turn the handle on this

Paper Gear to Download and Make. A simple paper gearbox

Downloadable Paper Projects. There are all sorts of fun paper