What to buy for our neighbours

MK

So my 6 months old is teething hard! Very grumpy, wakes up screaming multiple times during the night and poor him he's very uncomfortable. We live in a house surrounded by 3 more houses, i never really met our neighbours since we just moved in here about three months ago and was quite busy, but i feel like buying them something along with a note to let them understand and also to appreciate their understanding.

So what do you suggest ?