Explore above and below the waves by flipping this reversible book! Voyage with seabirds, explore a rockpool, discover a shipwreck and meet creatures living deep underwater in this ultimate guide to the ocean. Waterworlds is full of astonishing facts, fun activities to try and beautiful illustrated scenes to enjoy.Discover why the sea is blue, how boats float and the rhythm of the tides, before flipping the book to read about the hidden world beneath the waves.Find out what lives in the darkest depths of the ocean, how to make your own shipwreck treasure and explore the wonders of a coral reef.You'll find out everything you ever wanted to know about the ocean in this interactive guide to the watery world.