Stirling Engine - Science

I'm very excited about this Sterling Engine kit from Thames and Kosmos.

•  It does something practical
•  It was easy to get working (though like all good experiments, it required tweaking)
• The price for the kit is excellent.

Sterling Engines are an old idea that is getting new life in our green technology world.  The value of this machine is obvious the minute you see it start churning away after a few minutes in the sunshine!