4

Maddy's Washington, D.C. Diary

4

Maddy's Washington Diary

4

Famous Americans: George Washington

4

Yellowstone National Park

4

Washington Monument

4

Stonehenge, England

3

Clayton Does The Unthinkable

3

Isaac Newton

3

Clayton Does The Unthinkable

4

Jewels, Gemstones, and Birthstones

3

David Livingstone

4

The American Civil War

3

Valleys of the World

3

Gulfs of the World

4

History of the United States

4

From the American Revolution to the Civil War

3

Chinese New Year

4

Maddy's Illinois Diary

4

Chip's Tips on Switzerland

3

Lunar Eclipse

3

Pressure

4

Maddy's Oregon Diary

4

Maddy's Delaware Diary

2

One Odd Yellow Fellow

3

Christopher Columbus

4

Mount Kilimanjaro, Tanzania

3

Caves of the World

3

The Little Mermaid

3

Famous Explorers

4

Petra, Jordan