Build this ultralight biplane using these vintage plans from the 1960’s. this homemade airplane features wood frame covered with dacron fabric. motor is a. If you can fix a bike, you can build a put-put that’s almost as convenient as a second car and costs far less to run. you simply get on this homemade scooter. Plywood boat plans. if you are looking for a way to build an inexpensive boat you should definitely consider plywood boat plans. using plywood is one of the best ways in which to build a fishing boat at a very affordable price..