How old is DH's GD?
Every 1 y/o (or close enough) I have ever met thinks that this is the greatest toy known to mankind.
http://www.amazon.com/Hasbro-Playskool-Busy-Ball-Popper/dp/B00007G39IThis is another hit.
http://www.amazon.com/Cloud-Twilight-Constellation-Night-Turtle/dp/B000BNQC58Also you could get them a gift certificate or membership to their local zoo, children's museum, kid's gym
www.mygym.com, or kinder music
www.kindermusik.com. They have class for infants.