- What the Road Said
- What the Sea Left Behind
- What the Sea Left Behind (Enhanced Edition)
- What the Sun Can Do
- What the Turtle Told Her Children
- What the Whole Family Said
- What The Wind Blew In
- What the World Could Make
- What the World Needs Now
- What the World Needs Now Is Love
- What Tilly Knows
- What Time Is It?
- What Time is It?
- What Time Is It? "Hickory Dickory Dock" and "Wee Willie Winkie"
- What Tippie Saw on Easter
- What To Do About Your Monsters
- What To Do If An Elephant Stands On Your Foot
- What to Do If You Get Lost
- What to Do on a Rainy Day
- What to Do When I Am Sad
- What to Look For in Autumn
- What to Look For in Spring
- What to Look For in Summer
- What to Look For in Winter
- What Toys Can Do
- What Treat Can Ruben Eat?
- What Was D-Day?
- What Was Ellis Island?
- What Was Hurricane Katrina?
- What Was I Thinking?
- What Was Pearl Harbor?
- What Was Pompeii?
- What Was Stonewall?
- What Was That Noise?
- What Was That?
- What Was the Age of Exploration?
- What Was the Age of the Dinosaurs?
- What Was the Alamo?
- What Was the Battle of Gettysburg?
- What Was the Berlin Wall?
- What Was the Bombing of Hiroshima?
- What Was the Boston Tea Party?
- What Was the Gold Rush?
- What Was the Great Chicago Fire?
- What Was the Great Depression?
- What Was the Harlem Renaissance?
- What Was the Hindenburg?
- What Was the Holocaust?
- What Was the Ice Age?
- What Was the Lewis and Clark Expedition?
- What Was the March on Washington?
- What Was the Plague?
- What Was the San Francisco Earthquake?
- What Was the Titanic?
- What Was the Turning Point of the Civil War?: Alfred Waud Goes to Gettysburg
- What Was the Underground Railroad?
- What Was the Vietnam War?
- What Was the Wild West?
- What Was Woodstock?
- What Was Woodstock?
- What We Do in Fall
- What We Do in Spring
- What We Do in Summer
- What We Do in Winter
- What We Eat
- What We Found in the Sofa and How It Saved the World
- What We Saw
- What We'll Build
- What Were the Negro Leagues?
- What Were the Roaring Twenties?
- What Were the Salem Witch Trials?
- What Were the Twin Towers?
- What Were You Thinking?
- What Will Be Born?
- What Will Cora Be When She Grows Up?
- What Will Fit?
- What Will Happen to Jojo?
- What Will Happen Tomorrow, When I Go To School?
- What Will Hatch?
- What Will I Be Today?
- What Will I Be When I Grow Up?
- What Will I Do with My Love Today?
- What Will I Play While You Are You Away?
- What Will Little Bear Make Today?
- What Will My Story Be?
- What Will Willabe Be?
- What Will You Dream of Tonight?
- What Would It Be Like to Be a King
- What Would Jesus Do?
- What would you like to wear?
- What Would You Rather Do?
- What Would You Wish For?
- What You See at the Park
- What You Will See Inside a Hindu Temple
- What You Will See Inside a Mosque
- What You Will See Inside a Synagogue
- What Zeesie Saw on Delancey Street
- What's a Banana?
- What's a Belly Button Good For?
- What's a Blue Jay?
- What's A Dinosaur Doing In The Garden?
- What's a Girl to Do?
- What's a Mommy?
- What's a Monster?
- What's a Pair? What's a Dozen?
- What's a Witch to Do?
- What's an Apple?
- What's Behind The Big Red Door?
- What's Behind the Mighty Fitz?
- What's Black and White and Stinks All Over? #4
- What's Different (Can You Spot The Differences) Volume 2
- What's Different (Pre School Edition) Volume 4
- What's Different (Pre School Edition) Volume 5
- What's Different Volume 3 Part 1
- What's Different Volume 3 Part 2
- What's Different Volume 8 Part 1
- What's Different Volume 9 Part 1
- What's Different Volume 9 Part 2
- What's Different Young Children Volume 12
- What's for Breakfast?
- What's for Dinner, Mr Gum?
- What's for supper?/Qu'est-ce qu'on mange ce soir?
- What's Going On Inside My Head?
- What's going on?
- What's Great about Alabama?
- What's Great about Alaska?
- What's Great about Arizona?
- What's Great about Arkansas?
- What's Great about California?
- What's Great about California? (Enhanced Edition)
- What's Great about Colorado?
- What's Great about Colorado? (Enhanced Edition)
- What's Great about Connecticut?
- What's Great about Delaware?
- What's Great about Florida?
- What's Great about Florida? (Enhanced Edition)
- What's Great about Georgia?
- What's Great about Georgia? (Enhanced Edition)
- What's Great about Hawaii?
- What's Great about Idaho?
- What's Great about Illinois?
- What's Great about Indiana?
- What's Great about Iowa?
- What's Great about Kansas?
- What's Great about Kentucky?
- What's Great about Louisiana?
- What's Great about Maine?
- What's Great about Maryland?
- What's Great about Massachusetts?
- What's Great about Massachusetts? (Enhanced Edition)
- What's Great about Michigan?
- What's Great about Minnesota?
- What's Great about Minnesota? (Enhanced Edition)
- What's Great about Mississippi?
- What's Great about Missouri?
- What's Great about Montana?
- What's Great about Nebraska?
- What's Great about Nevada?
- What's Great about New Hampshire?
- What's Great about New Jersey?
- What's Great about New Mexico?
- What's Great about New York?
- What's Great about New York? (Enhanced Edition)
- What's Great about North Carolina?
- What's Great about North Carolina? (Enhanced Edition)
- What's Great about North Dakota?
- What's Great about Ohio?
- What's Great about Oklahoma?
- What's Great about Oregon?
- What's Great about Pennsylvania?
- What's Great about Puerto Rico?
- What's Great about Rhode Island?
- What's Great about South Carolina? (Enhanced Edition)
- What's Great about South Dakota?
- What's Great about Tennessee?