Trying to get kids to stop killing lawn

I'm really trying to be a good neighbor but the next door neighbor kids play ball on the small front lawns and end up killing their lawn and part of mine. I'm not heartless, really. The backyards are absolutely HUGE but for some reason this family plays on the front yard since moving in 3 yrs ago. They've killed half my lawn on the one side, trampled our flowers and turned it into a mud pit when it rains. We're selling our house in about a year but I want to plant grass and see if they'll stay off of it long enough to get it to grow but what are my options? Talking to the parents did nothing.

https://imgur.com/a/vwhhjjL