Science & Educational Gifts for 11 Year Olds

Leonardo da Vinci developed a range of innovative war machines that improved upon traditional medieval designs.This catapult is adjustable and incl...

Robotic articulated arms can be found in factories all over the world. This model uses a battery of independent hydraulic circuits to provide absol...

This Hydraulically operated and geared catapult is relatively easy to make, will amaze your friends, and launch all sorts of things all in the name...

The Leonardo Emergency Bridge is finally here! Designed to be set up and removed quickly by armies (Lego armies for this bridge). This is a simple ...

Leonardo da Vinci developed concepts for a human powered flying machine late in the 15th century. Based on his drawings from the Codex Atlanticus, ...

Bring history to life with the da Vinci Mini Trebuchet! This working miniature recreates Leonardo’s clever 15th-century design, letting you launch ...