The Chinese South Pointing Chariot
It was invented in China, about 2600 years ago, and is one of the most precise machines in ancient history. It is a non-magnetic compass, and the oldest example of differential gearing in the world.
$59.00 more info
Leonardo DaVinci's Cam Hammer
This cam-operated automatic hammer is a perfect addition to anyone's collection of Leonardo DaVinci's works!
$24.95 more info
The Rubber Band Shooter kit
How does an escapement work? With
this rubber band shooter kit, you can
build an all-wood rubber band shooting
escapement mechanism. It's not a six-
shooter, this rubber band gun shoots
eight shots between loading!
$14.95 more info