Two types of Christmas tree models are proposed. They are constructed with the same tree trunk but with different tree crowns. Tree crown 1 (photo on the left and centre) uses two different sizes of octagons. Tree crown 2 (photo on the right) includes a star that is constructed from five parts that are cut from one square paper, without left-overs. This model folds easily from ordinary kami paper: a 6" square yields a tree trunk around 4.5" tall and you will get a Christmas tree which is going to be around 7" tall when complete.