In Oceans and Seas! With 25 Science Projects for Kids readers ages 7 though 10 dive into the underwater world of some of the most amazing landscapes on Earth. On this amazing underwater adventure, kids experience the ocean’s tropical reefs and spot crabs, sea sponges, and thousands of kinds of fish darting in its crags and folds. They’ll meet a giant squid with eyes the size of dinner plates and an umbrella-like bioluminescent jellyfish.