The kiddie football league limits full-speed collisions—but only in practice. In games, it'll still be legal to watch your child get his block knocked off: "Dr. Matt Grady, a pediatric sports medicine specialist at the Children’s Hospital of Philadelphia, said the new rules, while a good start, did not go far enough, and that the emphasis in football for players who have not yet reached high school should be on developing skill and technique, not learning how to tackle. “Playing tackle football at 10 years old doesn’t translate to being a pro athlete,” he said. “I think the ability to catch and run and throw translates to being a pro athlete. Players should develop these skills, and then we can add in the collisions later.”"
As I think I've said before, it's going to be increasingly untenable for most parents to let their kids play tackle football as it becomes more and more clear that the game takes a huge toll on their bodies. That'll dry up the supply of players over time. Football is going into decline.