What are great, imaginative, helpful gifts for a newborn or new parents?

I’m visiting one of my best friends immediately after she gives birth for a few days. I don’t want to give her another onesie – and I don’t have kids myself but I bet there’s some really useful things that new parents would like. I already gave a her a cute coat for the baby, a sling to carry him/her on her back, and a children’s book—- and I plan to cook for them like crazy while I’m visiting. Creative ideas for other things to bring or do?