Make a 3-D Christmas tree for your dinner table with this simple napkin-folding technique. Begin by folding your napkin in half, and pressing the cloth with an iron to smooth out any wrinkles. Next, fold the corners to meet in the center, and press again with an iron. Fold the bottom corner up and the top corner down to meet in the middle, and press with an iron. Fold the cloth in half one more time, and then use the creases to invert the top folds, using an iron to press it down. Finally, insert a star pin and fan the folds out to make the tree stand up.