No assembly required this year, but the last three involved me assembling something for one of the GF's kids. Two years back the kids were out late at a Christmas Eve function, and of course we couldn't get them to go to bed. So we finally get them asleep, I start assembling a dollhouse that takes me hours to put together, finally get to sleep around 4:30 and the kids were up before 6, uggghhh. But damn, it is so worth it to see their excitment.