What is it made of I am designing another pedal power aircraft like it but I do not know what to use for a matirial I am only 14 after all I don't know what I can use and what I can't. I have the design but know consept of what I matirial I need to cover the structure though I am working on the pedal system but I am close to figuring it out. I just need the fabric not the wood or metal. PLEASE REPLY HELP!