Izhar Gafni should be an inspiration for us all. He made a bicycle out of cardboard. Everyone thought he was nuts – impossible they said. The idea kept bothering him, so his wife encouraged him to try – he wouldn’t have peace until he at least tried it. You can see the results in the video from this article.
Don’t let naysayers discourage you from pursuing your ideas or dreams. Just do it – what have you got to lose?