Hello, World! Solar SystemA new board book series designed to convey very simple nonfiction concepts to babies and toddlers. Learn from home and explore the world with these fun and easy board books! Every young child loves to look up at the moon in the night sky. Here's a Hello, World! board book that teaches toddlers all about the sun, moon, stars, and planets with colors, shapes, sizes, and super simple facts. Hello, World! is a series designed to introduce first nonfiction