Audisee® eBooks with Audio combine professional narration and text highlighting for an engaging read aloud experience! Roots help keep plants alive. They take in water and minerals. But do you know how much of a plant is made up of its roots? Or whether roots always grow down? Let''s experiment to find out! Learn more about plants in the Plant Experiments series—part of the Lightning Bolt Books™ collection. With high-energy designs, exciting photos, and fun text, Lightning Bolt Books™ bring nonfiction topics to life!