Learning to ride a bike

Do any of their friends ride bikes without training wheels? Sometimes just being around other kids who do is enough incentive. I also think that just letting them ride with training wheels a bit longer is fine. My son learned when he was 7 but he was so comfortable with his bike by then just from hours riding with the trainers that it was an easier tradition. Don't force it. Let them decide.

Balance bikes are amazing for helping a child learn to balance themselves before adding in the pedals.

Have you tried using a strider bike (bike without pedals and no training wheels)? We used these with our kids and they never used training wheels. We loved them! When we did transition to a pedal bike, I found that working on a very (very!!) small hill helped them gain a little speed to feel better while balancing. It was way easier on our backs, that's for sure! We didn't have to bend down and hold the seat all the time.