Boats

Wacky Lassie: an instant double paddle canoe to be built and used by kids
This boat is designed to be quickly built by kids using modified Bolger/Payson "tack & tape" construction methods, with techniques that minimize the use of hazardous materials, and maximize suitable children's skills

Smooth Sailing: Build A Sailing-Rowing Dinghy - Popular Mechanics
There's only one reason to own a small wooden sailboat-it's fun, pure and simple fun.