Something your girls might like would be The Hollywood Museum. It's on North Highland so probably close to where it sounds like you may be spending time anyway (i.e. Walk of Fame.) It's in the old Max Factor building so it also includes some exhibits related to glamour makeup for past starlets. When I visited a few years or so ago, it had a mix of both old and new Hollywood so they can see things that may have high appeal to them, like costumes from the Hunger Games.