I want to get ds a bike to learn to ride on (I've been a bit remiss and he can't ride yet). I'm probably going to get him a new one and would like it to last him a few years. He's about 135cm tall. Tbh I don't know what I should be looking for and what sort of price it would be. Would decathlon of halfords be good places to look? I don't want to spend more than £150 max (preferably a lot less!)
Any advice would be very welcome indeed 