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 you can toss popcorn around when your parents are n...

This kit contains all 4 kits in one mini-jumbo box of fun. All the complete kits and instructions are included and not only is this great value, but we think every class that studies levers and simple...

Leonardo da Vinci was a prolific inventor and artist who came up with new ideas and redesigned inventions from earlier times. This catapult is one of his redesigns from the medieval catapults of 400 o...

Leonardo DaVinci developed a range of innovative devices that were revolutionary and considered experimental at the time. This device was tried at the time of invention and later by other inventors in...

Leonardo Da Vinci developed a range of innovative devices that were revolutionary and considered experimental at the time. This device was tried at the time of invention and later by other inventors. ...

Leonardo Da Vinci was a prolific inventor and artist who came up with amazing ideas for machines to attack and defend the Lords and Dukes of the time. This armored tank is a unique design that had...

While Trebuchets were common siege engines in Medieval Times, Leonardo’s take on the most powerful weapon of the time was unique – his design used one main mast, different from all others before! B...

The catapult has a long and interesting history. It has been around in many forms, evolving since about 400 BC. This model is based on the medieval styles that were used during the middle ages. Standi...

The Siege Tower was use by invading armies to breach the walls of the castle they were attacking. They varied in size and construction, but the one we have here is typical of the styles used from abou...

Considered by many to be the most powerful and destructive of all the siege engines, the trebuchet took many forms throughout the Medieval world, hurling huge rocks, giant fireballs and even diseased ...

So we made one to give an opportunity to see how levers work and are applied in a cool machine. Lifting materials horizontally is important in some places, where an item has to stay level, so with a p...

A common sight around the world, the Struass Trunnion Bascule Bridge includes a unique collapsing mechanism that is a joy to watch. The design allows ships and other toys to pass through underneath. S...

Designed to get both boys and girls into learning about levers and simple machines, trajectories, fluid power and engineering, this newest kit has three different throwing machines in one, and nothing...