- Waiting for Ice
- Waiting for the Night
- Walking in Gagudju Country: Exploring the Monsoon Forest
- Walking the World in Wonder
- Wangari Maathai
- Wanted! Criminals of the Animal Kingdom
- Warning: Wild Weather Ahead
- WARP: Mestarin kosto
- Warum leben Meerschweinchen nicht im Meer?
- Warum Schiffe schwimmen und Löffel nicht
- Was Kinder wissen wollen – Wo beginnt der Regenbogen?
- Was Kinder wissen wollen – Woher kommen Sommersprossen?
- Washington D.C. From A-Z
- Wasser. Geschichten zum Planschen, Staunen und Forschen
- Watch It Grow: Writing, Simplifying, and Evaluating Expressions
- Watch Me Do Yoga
- Watching Stars
- Watching the Weather
- Water All Around
- Water Cycle
- Water Cycle Geo Facts
- Water is Everywhere!
- Water Is Water
- Water Land
- Water Parks
- Water Scientists
- Water Works
- Water World
- Waterfalls
- Waterfowl for Kids
- Waves
- Waves and Information Transfer
- We Forgot
- We Forgot (Readaloud)
- We Gather Together
- We Have Earthquakes
- We Have Hurricanes
- We Have Tornadoes
- We Planted Seeds Today
- Weather Affects Me
- Weather and Climate!
- Weather For Kids
- Weather Patterns
- Weather Scientists
- Weather Words and What They Mean (New Edition)
- Weeds Find a Way
- Wegener l'uomo che muoveva i continenti
- Weird and Amazing Places in the Natural World
- Weird Facts about the Human Body
- Weird, Wild, Amazing! Desert: Exploring the World's Incredible Drylands
- Weird, Wild, Amazing! Forest: Exploring the Incredible World in the Trees
- Weird, Wild, Amazing! Sky: Exploring the Incredible World in the Clouds
- Weird, Wild, Amazing! Water: Exploring the Incredible World Beneath the Waves
- Welcome Home: Where Nature's Most Creative Creatures Dwell
- Welcome to Arizona (Welcome To)
- Welcome to California (Welcome To)
- Welcome to Colorado (Welcome To)
- Welcome to Florida (Welcome To)
- Welcome to Maine (Welcome To)
- Welcome to Texas (Welcome To)
- Welcome to the World, Zooborns!
- Well, Will You Look at That? Ears
- Well, Will You Look at That? Eyes
- Well, Will You Look at That? Locomotion
- Well, Will You Look at That? Mouth & Teeth
- Well, Will You Look at That? Noses
- Well, Will You Look at That? Tails
- Wendel and the Robots
- Wendy, Where Does Our Wastewater Go?
- Werewolves
- West Coast Wild ABC
- West Coast Wild at Low Tide
- West Coast Wild Babies
- Wetlands
- Wetlands Inside Out
- Whales
- Whales: A Kids Fun Facts Book
- Whales: Giants of the Deep
- What a Seed Might Read
- What a Waste
- What Am I? Where Am I?
- What are bulbs and roots?
- What are Eco-Cities?
- What are flowers?
- What are Eco-Cities?
- What are flowers?
- What are landforms?
- What are leaves?
- What are seeds?
- What are stems?
- What Are Waves?
- What Blossoms in Spring?
- What Do Animals Do in Spring?
- What Do Animals Do in Summer?
- What Do Animals Do in Winter?
- What Do Insects Eat?
- What Do People Do in Spring?
- What Do People Do in Summer?
- What Do People Do in Winter?
- What Do They Do with All That Poo?
- What Do You Find in a Backyard?
- What Do You Find in a Coral Reef?
- What Do You Find in a Pond?
- What Do You Find in a Rainforest Tree?
- What Do You Find in a Tide Pool?
- What Do You Find on a Saguaro Cactus?
- What Does an Engineer Do?
- What Does Green Mean?
- What Does It Mean to Be Green?
- What Does One Reef Matter?
- What Does One Reef Matter? A 15-Minute Book, Educational Version
- What Does Spider Poop Look Like?
- What does the camel say?
- What Does the Moon Taste Like?
- What Eats That?
- What Happens to a Hamburger?
- What Happens to Our Trash?
- What Happens to Plants in Summer?
- What Happens to Plants in Winter?
- What if Night?
- What If You Had An Animal Nose?
- What If You Had An Animal Tail?
- What If You Had Animal Ears?
- What If You Had Animal Eyes?
- What If You Had Animal Feet?