SoCal GTers and GTers who have toured LA, what is the best Hollywood tour?!

Let me explain: I actually live in the greater LA area, so it's not really for my benefit (although I love having an excuse to do cheesey touristy stuff), but Foxylocksly's much younger sister (she is 13) is coming to visit from NorCal and has never seen LA. She has definitely expressed a desire to see the Hollywood sign, but I also want to try and hit all the main Hollywood tourist spots. I thought a bus tour might be a good way to go. So, any recommendations? What would make a super cool (I mean like us cool, not Regina Sparks cool) thirteen year old squeee all day?