N.W.
When I had my second baby...my cousin, who is a teacher, bought me an odorable outfit for the baby. Then, about a month later (she is a teacher) she had a snow day and called and said to have my 3 year old ready, she was picking him up for the day and bringing him back to her house to plan with her son (2.5). It gave me a whole afternoon to focus on the baby and rest a little. It was really the best gift.
If you can't do something like that, I think every new mom loves a new pair of comfy PJs.