Blast off! Young astronauts can explore rockets, rovers, space shuttles, and more in this nonfiction board book from the bestselling series Hello, World! Preschoolers and toddlers can learn all about the wide world of spacecraft in this cheerful and informative board book--with colorful art and super-simple facts. ("A rocket flies by burning fuel and turning it into hot gas.") Told in easy-to-understand terms alongside bright illustrations of space machines and vehicles, this sturdy book makes learning easy for little ones and offers useful prompts to help adults engage with the reader on each page. It's a perfect way to bring science into the busy world of babies, toddlers, and preschoolers, where learning never stops.