These made to order $950 kits will allow you to build your very own mini boat at home. American company Rapid Whale has created "Mini Boat," a miniature boat measuring 6ft in length and around ...

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.