4

Early Native Americans

3

Coral Reefs of the World

4

Maddy's Texas Diary

4

Maddy's Nevada Diary

4

Maddy's Wyoming Diary

4

Sharks and Other Sea Life

2

Hot and Wet! Tropical Rainforest

4

Musical Instruments

4

Maddy's Montana Diary

4

Maddy's Arizona Diary

4

Maddy's Ohio Diary

4

Maddy's Colorado Diary

4

Chip's Tips on Switzerland

3

Capes and Peninsulas of the World

3

Mountains of the World

2

Wheels on the Bus

4

Maddy's Missouri Diary