As far as constructing the frame goes, make sure you carefully ... and who doesn't want to zip around in their own homemade go-cart? Jay Bennett is the associate editor of PopularMechanics.com.

Experience the joy of creating a DIY kids go kart with an aluminum frame, 350W motors, and a battery-powered design. With a max speed of 30 miles, it’s perfect for thrilling rides.

There's a subset of Radio Flyer fans who are doing just that: turning the wagons inside out, adding motors, axles, wheels, and raising pedestrian neck hairs as they race their DIY go-karts down ...