Simple wall hanging for baby's nursery--also makes a great baby shower gift! Easy to make, inexpensive family of safety pins. I would find one with five frames, the last one with the two large safety pins surrounded by little safety pins of varying sizes.
Paper chain Advent calendar, with ABC's that rhyme for kids. The directions say to tear off one link per day. why not add one link per day, so you wind up with a garland for your tree at the end? Print it on cute paper to match your tree decorations.