4

How they work? Rockets

3

Rocks and Minerals

4

The Dome of Rock, Jerusalem

2

The Trail

4

Things to See in New York City

4

Tundra

3

Engineer

4

Maddy's Colorado Diary

4

Patsy and Paul at Uluru in Australia

3

Venus

4

Chip's Tips on Canada

4

Maddy's Wyoming Diary

4

The Sami People

3

Thanksgiving Day

1

The Big Black Ship

4

The Giant's Causeway, Ireland

4

Chip's Tips on Finland

4

Maddy's Utah Diary

3

Space Exploration

1

Sports

3

Sinkholes of the World

4

Grand Canyon

4

Maddy's Nevada Diary

3

Sacagawea

3

St. Patrick's Day

3

Asteroids

4

Chip's Tips on South Africa

3

Astronauts

1

Cosas que son Grises

4

Maddy's Oklahoma Diary