This series for young children provides easy-to-understand facts and answers. Launching the series is Who Has What?, a simple story following Nellie and Gus on a family outing to the beach. Humorous illustrations, conversations between the siblings, and a clear text all reassure young kids that whether they have a girl's body or a boy's, their bodies are perfectly normal, healthy, and wonderful.

The U.S. Marine Corps dates back to the American Revolutionary War. Marines are known for being first to arrive at conflicts around the world. Learn about the roles of Marines and their training, and get an inside look at the advanced equipment, aircraft, and weapons the Marines use to complete their tough missions.

The U.S. Navy traces its roots back to the American Revolutionary War. Then, its small fleet was outnumbered. Today, it is the largest navy in the world. Learn about the roles of sailors and their training, and get an inside look at the different types of ships, aircraft, equipment, and weapons the U.S. Navy uses to complete missions around the world.