4
Canterbury Cathedral, Canterbury, England
4
Hadrian's Wall, England
3
Charles Darwin
3
Straits of the World
3
The Old Lady and Her Pig
3
Gravity
3
St. Patrick's Day
4
The American Revolution
3
Stealing Sally
4
From the American Revolution to the Civil War
3
Force
4
The Anglo-Saxon Invasion of Britain
4
Maddy's Rhode Island Diary
4
Maddy's New York Diary
3
May Day
3
Thanksgiving Day
3
Momentum
3
Christopher Columbus
3
Malala Yousafzai
3
Stealing Sally
4
Buckingham Palace, London
3
William Shakespeare
3
Motion
3
Daniel Boone
3
Rabindranath Tagore
3
Chinese New Year
4
Money
3
Mahatma Gandhi
3
Lazy Jack
3
Team Sports