I remember my first year of my kids playing flag my daughter was 7 and son 4,my daughters coach said oh shit I have a girl on my team.To his surprise she was one of the best for him,played QB after how he seen she could throw(not right away) and safety.Was very surprised how well she anticipated stuff and her speed.Only reason I know that he was surprised and that he wasn't to enthused with having a girl on his team was his wife talked to mine.By the end of the year she was on the field second to none.The following year the lead team some how found a way to get her on theirs,long story short is they are only that young and you already have certain coaches trying to stack their team,I ended up getting them out of that league for that simple fact.There was good coaches but some that had friends higher up and stacked teams unfairly,at that age you want a competitive field so they can all have fun and enjoy it.