Paper ball ornaments for your Christmas tree

Step 7 Almost there... (pre-creasing 4)

Unfold it and fold one corner to the other side (now we have a triangle shape on one side); fold it again by the middle, so you are going to get a smaller triangle; unfold it and do the same with the other side (see the crease pattern, it is more complex now. Important: at this point you don't need to unfold it, I just wanted to show how the crease pattern changes as we make more foldings)

NOTE: If you don't understand this step, then watch the video on step 10.