A sweet idea for a baby shower or even a first birthday: party-goers make wishes for the guest of honour (Art Bar) Then you can hang it in the baby's room!
Guest "sign-in" for baby book or the dedication page of the ABC book created during the baby shower. Have guest sign the balloons and maybe add the words "Made for you.
Wishes for baby clipped to a clothesline
Write a message on a diaper.(I know this is for a girl, but I think this diaper message thing is really cute!
FLORAL Books for Baby Insert Card Flower Baby Shower Invitation Insert Please Bring a Book Instead of a Card Cottage Chic Garden Shower