We just moved from NYC to a suburb and my 10 yr old is now learning to ride a bike. It's been ok, but he's getting frustrated that he isn't picking it up so quickly - no training wheels, he's really just getting the hang of balancing and coasting before pedaling. I pushed him to try today when he didn't want to and he quit in frustration after 15 minutes and says he doesn't want to ride, that he doesn't like it. I feel like this is a skill he should master but don't want to push him so hard that he hates it. Any pearls of wisdom??