I like the finger puppet idea. You could also make puppets and glue them to popsicle sticks: have pre-printed Adult and Child puppets... also a variety of pets (dog, cat, fish, etc) and the kids can recreate their family as puppets: pick out the appropriate pictures, color, glue to the sticks.
Maybe they could make placemats? Family togetherness = eating together? They could collage cut out cutlery, plates, and cups onto a placemat and then decorate as they see fit (draw their favorite foods, or just color at will)
Trying to live a simple life in a messy house in a complicated world with : DH, DD (b. 07/07), DS (b. 02/09), and DD (b. 10/10)