Print out this square pyramid template on A4 or Letter size green paper or cardstock. The printable includes 3 pyramid templates of varying sizes.
Position the middle-sized pyramid on top of the large pyramid. Gently push down the middle-sized pyramid so that the tip of the large pyramid is pushed inside the cross slits of the middle-sized pyramid. The glue you applied in Step 11 will bind the two pyramids permanently together.
Do Steps 10-11 for the small pyramid and position it on top of the middle-sized pyramid. Carefully push down on the small pyramid to glue it firmly onto the middle-sized pyramid. With all pyramids stacked one on top of the other, you now have a basic Christmas tree shape.
Do Steps 10-11 for the large pyramid. Create a tree trunk by inserting a toilet paper roll through the cross slits. Push the TP roll until the top touches the inside walls of the pyramid.
*Instead of using a TP roll, you can also roll a piece of brown cardstock or construction paper to make the tree trunk.