Over half a million children own the Hello, World! Solar System board book, and parents have praised its easy but stimulating facts, conversational tone, and bright, cheerful art. But what about when the Hello, World! child is older and ready for picture books? Now there's Hello, World! Kids' Guides, which pick up where the mega-successful board book series left off, at a higher reading level and a deeper exploration into each topic. On each page of Exploring the Solar System, readers will find a variety of ways to learn: -Fascinating details about each of the planets, including up-to-date information such as NASA's Perseverance rover and Ingenuity helicopter, which landed on Mars in 2021 - accompanied by bright illustrations. -A panel of facts about each planet for kids who love data, with information about the planet's size, distance from the sun, length of days and years, and more. -A running graphic that shows each new planet's place in the solar system relative to the sun. -A question on each page that asks the reader to think about the planets in relation to themselves, such as "Would you like to live on a planet with a long winter or a short winter?" and "What would you bring on your Mars rover?" Loyal Hello, World! readers who have aged up and kids who love science or space will find many captivating hours of learning and inspiration in the launch of this exciting new spin-off.