4

How they work? Rockets

3

Rocks and Minerals

4

The Dome of Rock, Jerusalem

4

Maddy's Alabama Diary

4

Chip's Tips on Chile

3

Thanksgiving Day

4

Chip's Tips on Canada

3

Venus

4

Maddy's Nevada Diary

3

Meteorites, Meteoroids, and Meteors

3

Sacagawea

2

The Boat Crew

3

Individual Sports

1

Cosas que son Grises

4

Maddy's Massachusetts Diary

4

Tundra

4

Patsy and Paul at Uluru in Australia

4

Chip's Tips on Malta

3

Asteroids

4

Maddy's Delaware Diary

3

Comets

2

The Trail

4

Chip's Tips on Australia

3

Leonardo da Vinci

4

Maddy's Utah Diary

3

Christmas

3

Mercury

3

Zuri's Launch

4

The Sami People

3

Zuri's Launch