I'm glad you asked! Here's a step-by-step guide to creating a 3D Christmas tree using just paper and scissors:
1. Start with a piece of paper that's at least 12 inches wide and 12 inches long. Fold it in half lengthwise, creating a crease down the middle. Then unfold it and fold it in half widthwise, creating another crease. Unfold the paper, and you should have a cross shape.