A boat kit to build a wooden skiff style boat. row, sail or motor. the boat kit is designed for the novice boat kit builder.. Homemade jon boat built from uncle johns plans http://www.unclejohns.com/ took me approx six months to complete. 15′ 7" long, floor is 46" wide and sides. Discover free woodworking plans and projects for jon boat designs. start your next project for jon boat designs with one of our many woodworking plans..