I personally think ayso and kicking the ball around with siblings is fine for 6-8 year old. If I had taken my kids to personal trainers at that age, I think it would have taken the "fun play" out of it. It continues to be "fun play" at their older ages, but with the help of some excellent club coaching to teach first touch, skill, etc. With some personal training fit in here and there the past couple of years, but not too much. Would they be better is they had gone to personal trainers since 6? I guess so. But would it be worth it? And would they have loved soccer as much as they do during that time? My feeling is no. I have one very skilled, technical player and that is due 50% to amazing club coaches and 50% to her drive/love of the game that motivates her to kick the ball against the wall in the backyard, play with the neighborhood boys, watch YouTube videos of famous players, etc.