Hello, World! is a series designed to introduce first nonfiction concepts to babies and toddlers. Told in clear and easy terms and featuring bright, cheerful illustrations, Hello, World! makes learning fun for young children. And each sturdy page offers helpful prompts for engaging with your child. (“Can you point to the red planet? That’s Mars!”) It’s a perfect way to bring science and nature into the busy world of a toddler, where learning never stops. 


“A cheerful introduction to outer space.”—Booklist

“Supplemental tidbits ('Ouch! Asteroids and comets often hit this planet,' [McDonald] writes about Mercury) offer additional details to pique the interest of children just hearing about Earth’s cosmic neighbors for the first time.”—Publishers Weekly