R.
What about getting a foot spa and all of the things they would need to do manicures and/or pedicures..you can get most everything you would need from the dollar store and what you can't get from there you could pick up at walmart. Another thing that may be fun is let them cook...make their own pizza, tacos or whatever type of snack your daughter would like. Also, let them rent movies...that's always fun. Games, game tournaments, they mostly just like being together so they will probably make up their own things to do as well. HTH