I've got a 6 year old grandson who LOVES to see how everything works. The last time that he was over I took him down to my shop so he could see how the brakes worked and what happened when he shifted the gears on my beater. When his mom came to pick him up, he showed her everything and operated my head and tail light for her.

Tomorrow I'm planning to rework the stem and handlebar on my wife's hybrid bike. That sounds like an ideal project that he could help with. I'm excited. I hope that he has as much fun as I think that he's going to. I think that, with help, he'll be able to cut the handlebar to width and bolt most of the parts together.