I have an 8 y/o & 6 y/o, neither of whom can ride w/o training wheels. I've been trying to help the 8 y/o, get her started, b/4 taking the wheels off our 6 y/o's bike, thinking it'd be easier to help one learn @ a time. Any suggestions on helping her learn? We've held the bike for her @ the seat, we've tried holding the handlebars, we've tried trying to let her learn on her own. She's just not getting the hang of it. Any suggestions? Thanks.