4

The Golden Gate Bridge

4

The Tower Bridge, London

2

Building Bridges

3

Harbors of the World

4

Maddy's Kentucky Diary

4

Chip's Tips on Australia

4

Maddy's Kansas Diary

3

Houses from around the World

3

Florence Nightingale

4

Chip's Tips on United States

4

Hoover Dam

4

Landmarks of the United States

3

Isaac Newton

3

Vasco da Gama

3

Construction Worker

3

Isthmuses of the World

4

Chip's Tips on Nigeria

4

Chip's Tips on Canada

4

Chip's Tips on New Zealand

3

Helen Keller

4

Maddy's West Virginia Diary

3

Motion

3

Charles Darwin

3

Engineer

4

Maddy's Missouri Diary

4

Maddy's Connecticut Diary

4

Victoria Falls, Zimbabwe/Zambia

4

London Eye, London

4

Maddy's Massachusetts Diary

4

Things to See in New York City