Book excerpt: Imagine you were born before the invention of drawing, more than thirty thousand years ago. You would live with your whole family in a cave and see woolly mammoths walk by! You might even see images of animals hidden in the shapes of clouds and rocks. You would want to share these pictures with your family, but wouldn't know how. Who would have made the world's first drawing? Would it have been you? In The First Drawing, Caldecott Medal winner Mordicai Gerstein imagines the discovery of drawing...and inspires the young dreamers and artists of today.