The "paper Challenge" has really taken off with the fitness community and it is actually pretty simple.
All you have to do is fold a sheet of paper like a tent and put it on the ground. Then, planting just one foot solidly on the ground, try your hardest to pick up the sheet of paper using only your mouth. The hard part? you can’t let any body part or your hands even touch the ground until you have grabbed the sheet of paper and have stood up.