- Last stand, causes and effects of the Battle of the Little Bighorn, by Nadia Higgins
- Oceans, by Nadia Higgins
- Super shadows, by Nadia Higgins ; illustrations by Andrés Martínez Ricci
- Haunted houses, by Nadia Higgins
- Cinderella, retold by Nadia Higgins ; illustrated by Kathleen Petelinsek
- Océanos, por Nadia Higgins
- Perseus the hero, an interactive mythological adventure, by Nadia Higgins ; illustrated by Nadine Takvorian ; consultant: Dr. Laurel Bowman, Department of Greek and Roman Studies, University of Victoria, Victoria, BC, Canada
- How do cell phones work?, by Nadia Higgins ; illustrated by Glen Mullaly
- Communication then and now, by Nadia Higgins
- Count it!, by Nadia Higgins
- Solar systems, Nadia Higgins ; [edited by Jill Sherman]
- Trains, by Nadia Higgins ; illustrated by Sr. Sánchez ; music by Salsana Music = Trenes / por Nadia Higgins ; ilustrado por Sr. Sánchez ; música por Salsana Music
- It's a tornado!, by Nadia Higgins ; illustrated by Damian Ward
- Bella Thorne, shaking up the small screen, Nadia Higgins
- Needs and wants, by Nadia Higgins
- Natural disasters through infographics, by Nadia Higgins ; [illustrated by Alex Sciuto]
- What is money?, by Nadia Higgins
- The whole truth, writing fearless nonfiction, by Nadia Higgins ; Jenni Wittrock, editor
- Zombie field day, by Nadia Higgins
- Your mission to Jupiter, by Nadia Higgins ; illustrated by Scott Burroughs
- It's a thunderstorm!, by Nadia Higgins ; illustrated by Damian Ward ; content consultant, Steven A. Ackerman
- Wind and water shape the land, by Nadia Higgins ; illustrations by Jia Liu ; music by Erik Koskinen
- The story of Earth, by Nadia Higgins ; illustrations by Jia Liu ; music by Joseph Faison IV
- Medical robots, by Nadia Higgins
- Making a video game, by Nadia Higgins
- Issun Boshi (one-inch boy), a Japanese folktale, retold by Nadia Higgins ; illustrated by JT Morrow
- UFOs, by Nadia Higgins
- Beauty and the beast, retold by Nadia Higgins ; illustrated by Kathleen Petelinsek
- Columbus and the journey to the New World, written by Nadia Higgins
- Hansel and Gretel and the cheddar trail, by Nadia Higgins ; illustrated by Meredith Johnson
- Stinky animals, by Nadia Higgins
- Tectonic plates are on the move, by Nadia Higgins ; illustrations by Jia Liu ; music by Dean Jones
- Cinderella and the bowling slipper, by Nadia Higgins ; illustrated by Meredith Johnson
- Earth's record breakers, by Nadia Higgins ; illustrations by Jia Liu ; music by Mark Oblinger
- Henry and Hala build a haiku, by Nadia Higgins ; illustrated by Brian Dumm
- Hansel and Gretel, a favorite story in rhythm and rhyme, retold by Nadia Higgins ; illustrations by Marco Guadalupi ; music by Mark Oblinger
- US government through infographics, Nadia Higgins ; graphics by Alex Sciuto
- Grasslands, by Nadia Higgins
- Walk the plank, Plankton, written by Nadia Higgins ; illustrated by Jimmy Holder
- Hansel and Gretel, retold by Nadia Higgins ; illustrated by Kathleen Petelinsek
- The zombie next door, Nadia Higgins
- The solar system through infographics, Nadia Higgins ; graphics by Lisa Waananen
- Super exclamation point saves the day!, by Nadia Higgins ; illustrated by Mernie Gallagher-Cole
- Columbus and the age of explorers, by Nadia Higgins
- Defending the land, causes and effects of Red Cloud's War, by Nadia Higgins
- Forests, by Nadia Higgins
- Area 51, by Nadia Higgins
- Super period saves the day!, by Nadia Higgins ; illustrated by Mernie Gallagher-Cole
- Brilliant beauty inventions, Nadia Higgins
- Great Danes, by Nadia Higgins