What is sand made of? Which fish like to sunbathe? Discover everything you need to know about the world's oceans in this extraordinary fact book.

Flip through 100 fascinating facts covering everything from ocean creatures to early sea voyages, then test your knowledge with fun quizzes. Each page is packed with activities, projects and mind-blowing facts for a truly engaging experience. With stunning photographs and beautiful illustrations, this fun-filled book is sure to challenge young readers and prepare them for academic success.