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This kit contains 4 hydraulics kits in one mini-Mega box of fun.

Hydraulic Gearbots are not all that common, but the fun thing about this one is that it is relatively easy to make, will amaze your friends, and yo

We want our kids to ask questions, solve problems, and take the design process from conception to an end product.

One of the most common types of bridges for freight trains, our Truss Design Lift Bridge is a working replica of the many lift bridges that have be

Based on the classic design at Newcastle-upon-Tyne in the UK, this elegant design has been used for hundreds years around the world.

Probably the coolest bridge we make, this is a replica of the Joseph Strauss design that was made all over North America in the 1920's and 1930's.

The bridge was designed by Leonardo Da Vinci between 1485 and 1490, to be built rapidly with  local trees, that could be easily slid into place, la

One of Leonardo’s most iconic images, the Aerial Screw (also known as the Helicopter) illustrates the ingenuity of da Vinci, and indicates (along w

Considered by many to be the most powerful and destructive of all the siege engines, the trebuchet took many forms throughout the Medieval world, h

The catapult has a long and interesting history. It has been around in many forms, evolving since about 400 BC.

The Siege Tower was use by invading armies to breach the walls of the castle they were attacking.

This wooden cabinet with closed back is designed to display the entire range of Sensorial Mon

Our material cabinet with 3 shelves is made of