Science & Play Mechanics Lab - Triple Engined Helicopter and Airboat

This is a fabulous scientific kit for children to discover the secrets of aerodynamics and fluid dynamics.  Featuring two dynamic models of a three-rotor helicopter and airboat to build, children can discover the way transmission mechanisms work. The kit contains more than 130 interchangeable components including: gearbox, gears, bars, propellers and pins.  In addition to assembly instructions, a sheet with lots of interesting facts about the physics of flight and nautical engineering.