I am Mohammed and my teeth need cleaning, I wish I can brush them!
I have an idea! I CAN brush them! That tree is perfect!
Yay, I used this tree to make myself a toothbrush. I can smile now!
Circa 2,000 years ago, the toothbrush was invented. It was made out of a tree branch, which was rubbed against one's teeth. The toothbrush has been innovated ever since then and changed so much over the years. Next__________________>