4

The Golden Gate Bridge

4

The Tower Bridge, London

2

Building Bridges

3

Construction Worker

4

Things to See in New York City

4

Victoria Falls, Zimbabwe/Zambia

4

Chip's Tips on New Zealand

4

Maddy's Connecticut Diary

3

Isthmuses of the World

4

Chip's Tips on Canada

4

Chip's Tips on Australia

3

Isaac Newton

4

Maddy's Kansas Diary

3

Vasco da Gama

4

Chip's Tips on Nigeria

3

Bays of the World

4

Petronas Twin Towers, Malaysia

4

Maddy's Kentucky Diary

4

London Eye, London

3

Harbors of the World

4

Hoover Dam

4

Maddy's Missouri Diary

3

Florence Nightingale

3

Helen Keller

4

Maddy's Massachusetts Diary

3

Houses from around the World

3

Engineer

3

Motion

4

Maddy's West Virginia Diary

4

Chip's Tips on United States