[yorkietalkjilly]

I like BayleighL's ideas. It could work.

I've lived all my life with kids of various ages playing and swimming(next-door neighbors have had a pool these last 10 years or so) next door and often running into my front yard(and backyard at times) without that level or length of noise harassment. Noise that is that loud and sustained enough to make a neighbor's life miserable is usually illegal in the city and neither normal nor necessary for kids to thoroughly enjoy themselves so I'd probably walk over with a box fully loaded with iced and soft-serve cookies, iced and cream-filled cupcakes, doughnuts, goodies of all kinds and bribe them in the friendliest way into teaching their kids how to have fun without screaming to capacity day and night. It's entirely doable. These days too few parents seem to worry about how loud their kids get - amazes me at time that they put up with it themselves. Hint there could be more to come if the outcome if favorable.
And I'd probably secretly record the meeting just for my safety's sake.

Good luck!