Biomes of the World Cards provide a first lesson on the eight different biomes that are used throughout the biome materials. The categories chosen are broad, general, and suited for presentation to young children. In research, you will find such terms as tundra, savannah, boreal forest, and mediterranean scrub which can be investigated later by older children as subcategories or ecosystems within the biome. Each biome has an icon that is found on the back of cards and used to identify different sets or as a control of error.