Some of you people are not to kid friendly, are you?
Although I disagree with using any additional devices to make noise, kids have the right to play and they should - instead of watching TV or playing computer games. It really depends how often it happens, how noisy and how late it's done...
I'm sure you can bring it to the attention of the parents if it happens after 10 pm. If it does not help, you may also call the police...people in the USA usually go this route. Every state, city or town has a curfew how long the kids can be outside, depending on their age too. Hopefully there is something similar in Poland.
I have given up putting up threads here as i cant stand the unhelpful replies you get. Some people have too much time on their hands and need an outlet to deal with their childhood issues .
This is so true.