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
No glue! The unique structure of this bridge holds itself together without any fasteners or connectors.
All parts are precision cut from high-quality
hardwood.
The finished model is 36” wide, 10” tall and 5-1/2”
wide.
$21.95 more info
The classic "overbalanced wheel" 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.
$98.00 more info
The Medieval Battering Ram was an awesome force in ancient times. With it, a small group of men could easily bust through the portcullis and gates of virtually any castle.
$34.95 more info