Books, or Movie baskets, puzzle baskets, craft items are all nice.
I love the bath stocking idea. Gotta love the Dollar store!
Also as a mom with a bunch of kids, no clutter edible gifts are great, or movie tickets. If you live near a zoo or aquarium or kids science museum a season pass would make a great gift if you could chip in with other family members. Then they could get a lot of family fun out of the gift and nothing for mom to pick up