Apparently, Santa thought we'd have a much better time assembling it together than having the children experience the letdown of seeing it completed under the tree. Just so you know, this is an exercise in family bonding that has nothing to do with anyone's inability to manage time.
After the paint dries, we get to decide if we're competent enough to wire it, then furnish and decorate the interior.
ETC: A week. Or two. Three, tops.