In 1942, Spanish artist Pablo Picasso fabricated the "Bull's Head" out of a bicycle saddle and handlebars. This was during World War II and reflects the human imagination when challenged by frugal times.
In an interview with Picasso, reprinted in Picasso on Art, A Section of Views, he tells how he got the idea....
"I noticed in a corner the seat and handlebars of a bicycle, placed in such a way that they resembled a bull's head. I assembled these two objects in a certain way. Finally, I made this handlebar and seat a bull's head that everyone recognized as a bull's head. The metamorphosis was accomplished and I wish another metamorphosis would occur in the reverse sense. If my bull's head were thrown in a junk heap, perhaps one day some boy would say: 'Here's something which would make a good handlebar for my bicycle. Thus, a double metamorphosis would have been accomplished.'"