The Tuttle Twins and the Miraculous Pencil (Tuttle Twins, #2)

Did you know that nobody on this earth knows how to make something as simple as a pencil?

It's true—and in this adventure, Ethan and Emily Tuttle learn why. Growing up, they've taken for granted the many things they use: clothes, cars, homes, backpacks—even a simple pencil. In this fun field trip to an amazing factory, the twins learn not only how a simple pencil is made, but how this process is the key to prosperity in our modern age.