While stopping to admire some of the world's most amazing trees, the Cat and Co. teach beginning readers how to identify different species, many found in North America, from the shape of their crowns, leaves, lobes, seeds, bark, and fruit.

In rhyming text, the Cat in the Hat introduces Sally and Dick to the various inhabitants of the ocean, including herring, mackerel, jellyfish, sharks, manatees, and whales.

In rhyming text, the Cat in the Hat introduces the tropical rainforest and the ways in which its plants and animals interact.