How sweet that one of the staff members did her hair! It is so nice that she is getting individual tlc!
As for a gift for Allison..
Perhaps a gift card to a restaurant? I suppose it is a bit impersonal but students usually love them. Maybe put it in a card with Cali's picture.
Or....ask where the MSU book store is...maybe you can find something there!
That is so sweet that you want to give her a gift.