Build a Hovercraft With Your Kids — When Jamie Hyneman and MeFi's Own™ Adam Savage built hovercrafts for Mythbusters, he realized that these floating-on-air vehicles were easy to make, not too expensive, and fun. So he built one with his kids. More diy hovercraft fun.
Leaf blowers emit 34 times the hydrocarbons of a typical automobile per hour of operation. Fumes are compounded by noise. Cities from New York to California are banning them. Seems a straight forward issue, but what about time and money?