I got a "Hitchhiker" off Craigslist for a good price to try it out. The first 5 slow sidewalk trips to the end of the block were filled with "I'm afraid." The next attempt he didn't try to jump off as soon as we stopped, so I kept going and even went into the street. I could see him in the mirror with the biggest smile and his legs pumping away. His trike was always a slow crawl, so I think he's getting the idea this way. I hope that eventually he'll be on his own, but this looks like a great intermediate step. Once his little sister is riding, he may get real motivated. If he never gets the balance down, I might check into the adult trike if he looks like he'll take to it. Good discussion.