That's a touchy subject for sure.

Do you know or speak with the parents at all? Perhaps you could bring it to their attention - perhaps they don't know it's an annoyance to you since you don't have any kids of your own. Explain your situation and the need for some peace and quiet. Not saying they should keep the kids inside, but maybe they could tone it down a bit??? Hopefully the parents would be sympathetic to your issue about the noise.

Yes - kids will be noisy, but they should be taught to respect others too. The world doesn't revolve around just them!