Grandma and Grandpa gave us an awesome 1,000-piece puzzle for Christmas. It took us almost a month, but we got it done! (Full disclosure: I did about 75% of it. CC helped, with occasional input from Sweet Pea. Little Man mostly flew his Millenium Falcon through the pieces.)
Anyway, it was a great puzzle because it's all children's books, and we have most of them! So the kids had a great time watching the covers of some of their favorite books take shape.