depending on the age of your girls, I'd do a guided tour of the main park or the studios park.
I'd take them to the Disneyland Hotel (if you're not staying there) for breakfast one morning (anyone can do this, no matter where you are staying, and its not that expensive).
ride Big Thunder Mountain, Dumbo and Teacups all in the dark (soooo pretty).
Have you done Art of Animation? The end room is accessible without having to go through the rest of the attraction and the end room is full of Disney movie memorabilia, interactive games, and a fabulous little Gallery shop.