Join one girl as she leads her friends to a tree-planting ceremony. Along the way, she explains in simple language the value of the universe and Planet Earth. Readers will see the Big Bang, the Milky Way, all the planets in the solar system, as well as Earth’s atmosphere, and the life within it: its oceans, trees, bugs, and seven billion human beings. Finally, the girl and her friends plant a tree–doing one small thing to help their one special planet.