5, 4, 3, 2, 1, BLAST OFF! Bella and Vicky are two sisters with a love for science. Wanting to learn more about the different types of scientists, they start their journey learning about astronomers. Their friend Cody the iPad takes them on an adventure through the stars to discover new facts about their solar system and the scientists who study it. Together with Bella and Vicky, young readers will visit planets, asteroid belts, and more. After returning safely from space, readers can continue their adventure by following along with hands-on experiments and activities at the back of the book.