As the tin implies, I was trying to make my own wheels. My best (I think) idea at the moment was to pack two large washers onto a short cut-off from a wooden doll and put a rubber band over them (if that becomes an issue, glue the Rubber Bands. What kind of Adhesive? ) Not that I'm precluding manufactured wheels.
As it were, I figured that someone else might be so kind as to share some other schemes that might be used to construct them. I tend to find mechanical schemes in general interesting and enlightening, and I would appreciate all ideas. PCV pipe, wood, you name it.