Steam.Engines.Smartsteamtrike
Exergia has a ton of great kits… – “Sophisticated demonstration models of alternative energy technologies for universities, schools and interested individuals: Stirling Engines and steam engines, fuel cells, photovoltaic objects, toys and more! Discover extraordinary ideas in energy related devices: Educational devices inspired by old and new concepts to demonstrate the physical principles of conventional and alternative energy conversion.” [via] – Link.

Pictured here, SmartSteamTrike – Movable Steam Powered Trike…