My wife's family when she was growing up did this (I consider insane for parents) the tree was not put up until Christmas eve and the inside of the house decorated after all the kids were asleep. When she and her brothers and sisters came down on Christmas morning that's when all the kids saw it for the first time. She said they were so excited-- needless to say for years she had me doing that for our boys until they got older. We usually did not finish until until just before they woke up. I was totally exhausted but it was worth seeing their faces, just the same I was glad when we didn't do it any more. Any on else do this-- were we the only crazy ones?