4
Windsor Castle, England
4
Canterbury Cathedral, Canterbury, England
4
Stonehenge, England
4
Hadrian's Wall, England
3
Force
3
Rivers of the World
3
Harbors of the World
3
Power
3
Motion
3
Gravity
3
Christopher Columbus
3
Rabindranath Tagore
3
Team Sports
3
Thanksgiving Day
4
Maddy's Vermont Diary
4
Money
3
May Day
4
The American Revolution
4
Maddy's New York Diary
3
William Shakespeare
3
Mahatma Gandhi
3
Straits of the World
4
Early North American Settlers
3
Florence Nightingale
3
Lazy Jack
3
Pressure
3
Isaac Newton
4
Maddy's Rhode Island Diary
3
Lazy Jack
3
Charles Darwin