Learn how to make a beautiful fairy house from cardboard and clay in this easy DIY tutorial. This miniature house has built-in lighting, so you can place a garland or small light inside to create a ...

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.