Free soda can airplane plans are available at Pop-Can-Airplanes.com. This soda can airplane plan includes a small list of required materials and a simple step-by-step guide to putting the plane together. The instructions are detailed, because there are not any pictures or diagrams to use as a guide.
The free soda can airplane plan includes instructions to cut the tail of the airplane out of a piece of scrap metal and glue it to the soda cans. The online airplane part that needs to be purchased is the landing gear. The landing gear includes wires that need to be inserted into the plane.