Grades 3 - 7

The Eastern State Penitentiary was the first prison to use solitary confinement. This controversial form of punishment is said to have left many inmates mentally ill. A few were driven to… More →

Sunshine, solid ground, and fresh air. You don't find these things in underground coal mines. Miners must be prepared to work in pitch-black darkness and survive explosions, cave-ins, and the More →

For soldiers on the ground, the Humvee is a welcome sight. This multi-purpose vehicle serves as a weapons carrier, ambulance, troop shelter, and more. It takes a beating from harsh terrain,… More →

Members of the insect class often get a bad rap. People swat at them, stomp on them, and go to great lengths to repel them. Though some insects are pests that spread disease, many are… More →

Some animals lead a double life. First, they pose as aquatic creatures, breathing through gills and using tails to maneuver underwater. Then they exchange these features for legs and lungs to More →

Never come between a mother bear and her cubs. She will violently maul you until you are no longer a threat. Even if you're fortunate enough to survive her attack, you will likely leave with… More →

The largest animal alive is a mammal. It's the 150-ton blue whale. This whale is not only large but also loud—louder than a jet engine! Turn the pages of this book to learn about the… More →

Tigers retract their claws but never their fury. Surprise them when they are eating or sleeping, and you'll likely become the meal and be put to sleep permanently! When it comes to the orange More →

Compare a hummingbird and an ostrich; the differences are striking! One is tiny and hovers in the air like a helicopter. The other is massive and stays grounded, sprinting rather than flying. More →

Mark Henry is known as the strongest man in the world. Having competed in Olympic weightlifting and the World’s Strongest Man competitions, he has the history to back up that claim. In the… More →

Dinosaurs, the world's most notorious reptiles, became extinct a long time ago. However, their cold-blooded, scaly reptile relatives still creep around today. While people no longer have to… More →

Underwater, a large, lively community of unique animals thrives. Many of these animals belong to the fish class. There are colorful clownfish, lurking sharks, and silly sea horses. There are… More →