3

The Earth

4

Earthquakes

2

Hot and Dry! Desert

3

Valleys of the World

3

Sinkholes of the World

4

Amphibians

3

Charles Darwin

3

Archipelagos of the World

3

Amerigo Vespucci

4

Steppe

3

Rivers of the World

4

The Golden Gate Bridge

4

Maddy's West Virginia Diary

3

Garbage Travels

2

Evergreen Forests! Taiga

3

Space Exploration

3

Harbors of the World

4

Taiga

2

Hilarious Times with Nursery Rhymes

3

Isaac Newton

3

Oceans and Seas of the World

3

Glaciers of the World

3

Senses

2

Ecosystems

4

Mount Fuji, Japan

3

The Universe

3

Constellations

3

Solar Eclipse

3

Laugh Out Loud Talent Show

4

Mount Fuji, Japan