They are settling in. It's not going to be as exciting as fish (and my kids are still more interested in finding the snail in the aquarium, then seeing the fish ha ha) but I will post the progress here of my first foray into vermicomposting. For my own records if nothing else.
My little one did want to see what was in the box immediately, and helped sprinkle water and moist bedding over the worms. She was happy that a few of them wiggled.