You've piqued my interest. I know there's some degree of variability, but do kids usually push for a day and get it, days, or weeks? In my case it's enough years I can't tell you for sure how long my daughters used training wheels. I do know it went something like this. Older started out small "toy" bike with trainers, we gradually cheated them up, then as she was outgrowing it, graduated her to larger child mountain bike with no trainers. Younger took over toy bike, same process. Older daughter moved up to ex's ladies mountain bike that was graciously handed down, younger graduated to child mountain bike. There were many variables including limited practice time when not with me, but I think the trainers worked out well. I suppose either way provides your child with a fun toy to get them outdoors and exercising. Hopefully they get hooked!