Sure, here's a step-by-step guide to making an origami Christmas tree!
1. Start with a square piece of paper.
2. Fold the paper in half diagonally to make a triangle.
3. Unfold the triangle, and then fold the paper in half again.
4. Unfold the paper, and then fold the top corners down to the center line.
5. Open the paper and fold the top corners down again, but this time bring the corners to the edge of the previous fold.