We once got on that subject with my dad and he made us his one of his favorite toys his dad had made for him and it was an old spool and a rubber band, and a piece of a popsicle stick. He would put the rubberband through the center of the spool and across the top and then put the section of popsicle stick through the ends of the rubberband he wound it for us and let it go! It was the best tractor toy I had ever seen because it worked on its own (and without batteries)! I have since made that same toy for my son who is 4, and it is a way of him to learn about someone he will never know :) Suzanne