They do this all the time, it sucks living near one

Well, they're kids. They're just either having fun or they're upset.

they scream at each other for "cheating" or not playing with together

They want to act "friendly" with each other, that's for sure.

I saw a kid bite the other

idk, there was screaming more screaming, kid crying, parent yelling and the other kid crying

Little kids have needs. They also need to calm down.

Yes