Football is the most accessible sport for youngsters but probably the most competitive, good or bad, I’m not sure. I played in my youth up to county level and the abuse I and my teammates received from parents ( including my own!) is something I’m sure I wouldn’t want for my own kids.
A few weeks back I was at Glentress and they had some youth cross county competition and the parents seemed to be cheering even if they weren’t doing that well. Big smiles on faces all round. We never got cheered on in football when we were losing!
I would want my kids to take up cycling.
As for the expense, well if you ignore all the marketing hype then it’s accessible for a few hundred pounds.