My 7 year old great-niece is a real "girly girl" who loves dolls and all things pink! Last year I bought her brother the Lego Star Wars calendar. He loved it but; there wasn't anything similar out there for her. I was thrilled to find the Friends Advent Calendar for Christmas 2012. She can't wait to get started finding all of the little figures and accessories, there are plenty here to find, and they're going to be a good fit for her dolls house.
Lego advent calendars aren't cheap but, unlike the traditional advent calendars, the fun's not over once the chocolate's gone. They're also well made and quite durable, take a fair bit of rough handling.
If there's a criticism of the LEGO calendars I'd have to say that you need to watch out for all of the tiny components. The toys are small, easily lost, often sucked up into the vaccum cleaner or trodden under foot, so you need to be careful. I think that's the case with most LEGO once you get beyond the baby sets with their large, chunky pieces.
We like LEGO and have quite a collection, some of it's been around for more years than I can remember, and it's always good quality and enduring if you look after it.