The $29.99 all-metal desktop Stirling engine kit is one of the simplest. It can be assembled in 15 minutes and is recommended for ages 14 and up. Also for $29.99 is the Exploring Kid Steam Engine Kit.

Now $69, down 30 percent off its usual $100 sticker price, this miniature engine kit seems to suggest otherwise. Get It! Made ...

you could buy a mini engine kit and build a scaled-down example as the main feature of your coffee table. Many kits of varying complexity are available, and assembling one of these tiny engines can be ...

One model is a miniature of the original atmospheric engine designed by Thomas Newcomen A retired engineer, who has spent more than 50 years building miniature models of engines from the ...