Ah, Christmas napkins! They're the perfect touch for any festive meal. Let me teach you how to fold them into beautiful Christmas trees. First, take the napkin and fold it in half diagonally to create a triangle. Then, fold it in half again, this time along the base of the triangle. Now, bring the two corners together to create a small, triangular peak. Lastly, fold the napkin in half again, this time so that the peak is hidden inside the fold. Voila! You've got a lovely Christmas tree napkin.