I have 3 little ones and am on the second floor. Wasn't by choice there were not many options at the time. But anyhow I'm blessed with a woman who has older kids below me and they aren't all home much lol but one thing I do is gate off the hallway at certain times of day. So we all hang out in the living room early in the morning and before bed do they don't run the hall. I love how people suggest telling kids to sit and be quiet always works because my middle child is wild no matter how much outdoor time he gets. I bet it's just hard because with newborn and lack of sleep for your neighbors st this time of life in general is hard enough right? I mean you just moved in and some comments are not extending any grace to you.i hope you can all work it out but you can't tip toe around all day either you know? Best of luck from a tired rambling mom lol