I have coached 8 year old soccer for my oldest Daughter. This was about the time kids started showing signs of coordination and you could see which ones needed to move beyond house leagues pretty quickly. I helped with as young as incoming Kindergarten kids up to 4th grade.

In 4th grade my oldest made travel, but decided she didn't want to play anymore after tryouts. She changed sports completely against my suggestions. She had some real skill as a goalie and on defense. But as long as she is happy then what sport she plays doesn't really matter to me.

As for the parents...there were a few times I wanted to knock one of them out for being an ass towards their kids. Kids need to just have fun with sports when they are younger. Pushing them hard will rarely result in the outcome you are hoping for and is very likely going to have the exact opposite effect.