3

Firefighter

3

Comets

4

Felix's Independence Day

3

Astronauts

4

Victoria Falls, Zimbabwe/Zambia

4

Gorillas and Other Primates

4

Mount Fuji, Japan

4

How they Work? Trains

3

Police Officer

3

Motion

2

Lake Day

3

Meteorites, Meteoroids, and Meteors

4

Maddy's New Hampshire Diary

4

Hoover Dam

4

Niagara Falls

3

Neil Armstrong

3

Space Exploration

2

Who Works Here?

4

Okavango Delta, Botswana

3

Pollution

3

Bus Driver