Alloy Metal Mini Temperature Difference Stirling Teaching Kits Engine Model

Nice little educational 'toy'.

The engine i received is reasonably well made and operated out of the box with no adjustments needed. It ran for over an hour on a coffee cup of very hot (but not boiling) water. (the flywheel should be just a bit heavier, because when it started to run down it would push - slow down - pull instead of running continuously.) Nevertheless, a nice little engine and i would gladly buy it again.

Very nice toy, it works well from a coup of warm water, or even if you just put ice on top of it (without extra heat on the bottom).

This is a 200-year-old invention but it is still fascinating today.
My 4-year-old and 6-year-old grandchildren love it too.
It is a very beautiful and high quality engine.