I remember playing with a dollhouse, that my cousin gave me, constantly from about Leia's age until I was probably at least 10 or 11. It used to sit on a chest at the foot of my mom's bed, I'd have friends over and we'd play and play in there. The house was blue and it even had working lights, that I think broke before I inherited it. It didn't have any matching furniture or dolls or anything, but I made due. Leia's is going to be a little more deluxe than that, but I hope it still invokes all the imaginary play it did for me.
P.S. Her birthday isn't until the 21st so don't tell her.