In this easily understood, colorful book young readers are introduced to mushrooms, molds, and yeast, which are types of fungi. Fungi are found almost everywhere. Some are edible and some are poisonous. Fungi come in different sizes, from very small to very big. They do not make their own food but instead eat dead plants and animals, breaking them down into atoms and molecules which are left in the soil. Plants use these atoms and molecules to make their own food, and some plants are then used by animals for food. Mushrooms are connected in the soil, sometimes resulting in "fairy rings."

A pronunciation guide of scientific terms is included. 24 pages. Engaging, colorful illustrations and photographs. Reading Level 1-3, Interest Level 2-5. Lexile measure 460L.