What’s a good gift to buy for a new Baby/Child being born?

Pretty sure the mother is gonna made a baby shower and will have a gift list. If not you can ask them what they need, usually the most important and expensive is stroller, car sit, crib, baby carrier. If you want to give him a surprise give them a “white noise matching”, diapers size N or 0, baby bath tub, baby spa shampoo/soap, professional family picture gift card, Amazon or restaurant gift card. Don’t buy cloth, new borns grow too fast and people always give too much cute baby cloth. 

Hope you read this before YA is over lol

I always buy things off a registry or give gift cards so they get things they need or can buy things they need.  

buy him some toys to play with

Books, Books and Books make the best gifts.

Why can't you ask your brother what the child might need? Shocking I know, asking the actual person rather than a group of strangers.