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.
$69.00 more info
The Chinese South Pointing Chariot
- Easy Assembly Version
This Easy Assembly Version of our popular Chinese South Pointing Chariot comes with many of the same features but has been re-engineered to reduce assembly time and increase accuracy of the mechanisms.
$49.00 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
Leonardo DaVinci's Cam Hammer
This cam-operated automatic hammer is a perfect addition to anyone's collection of Leonardo DaVinci's works!
$34.95 more info
The Compound Gear Train
This Gear-Train model kit is a great way to demonstrate how compound gear ratios can reduce or increase torque and the effect that has on power and speed.
$24.95 more info
The Simple Gear Train
This Gear-Train model kit is a great way to demonstrate how simple gear ratios can reduce or increase torque and the effect that has on power and speed.
$24.95 more info
The Cycloidal Gear Drive
The Cycloidal drive is a fascinating power transfer device that creates a two-to-one gear ratio between the input and the output, without changing the direction of rotation.
$29.95 more info
Perpetual Motion Machine
The classic overbalanced wheel, a so-called "perpetual motion machine", as designed by French Architect Villiard De Honnecourt in about 1235, and studied extensively by Leonardo Da Vinci in the late 1400's.
$149.00 more info
The Lever Paradox
When discussing levers, Archimedes said: "Equal weights at unequal distances are
not at equilibrium." unfortunately, Archimedes never saw our Lever Paradox, where equal weights at unequal distances
do balance!
$34.95 more info
The Ferris Wheel
The Ferris wheel. A tower that moves, a ride that towers, a bridge between the ground and the sky. First invented in 1893 for the World's Fair in Chicago by George Washington Gale Ferris.
$89.00 more info