3

Valleys of the World

3

Comets

3

Nyaminyami The Spirit of the River God

4

Maddy's Ohio Diary

4

Maddy's Oklahoma Diary

2

Tennis

4

Chip's Tips on Nigeria

3

Sinkholes of the World

3

Venus

4

Maddy's Oregon Diary

3

Canyons of the World

4

Chip's Tips on United States

4

Chip's Tips on The Dominican Republic

3

May Day

4

Maddy's California Diary

4

Maddy's New Hampshire Diary

3

Fjords of the World

4

Maddy's North Dakota Diary

4

Maddy's Pennsylvania Diary

4

Chip's Tips on Mexico

3

Amazing Earth - Part 2

4

Maddy's New York Diary

4

Tornadoes

4

Maddy's Vermont Diary

4

Maddy's Nevada Diary

4

Maddy's Indiana Diary

4

Maddy's Maryland Diary

4

Maddy's Massachusetts Diary

4

Grand Canyon

3

Daniel Boone