Am I the Only Teacher Alive Who Does Not Know This Trick?

Is this not the cutest child in the world? His mom is my friend and that is why I can post his picture. He's wearing the Indian headband he made which is gorgeous but look at the back. My girlfriends next door showed me this idea which I have never seen in my life. They told me that have been doing it since the dawn of time! Now my headband addiction will be out of control. Some of our kids had a really hard time patterning these and  I can throw their formal assessments out the window. This is a much more valid way to see if they can apply these skills. If you know about this why are you keeping it to yourself? If you don't- I just changed your life and rocked your world! A big shout-out to my friends Krista, Alicia, and Belinda. Love you guys so much!