M.F.
Maybe some cute lollipops. Tie ribbons around them and put a little "Thank you" tag on them. You can display them in something like a flower pot, so it looks like a bunch/boquet of flowers. Put that foam stuff in the bottom of the pot so you have something to poke the stems into. Seems like Party City or some place like that would have "It's a Girl" lollipops, or maybe some shaped like pink teddy bears, etc.