3
Famous Explorers
3
Astronauts
3
Christopher Columbus
3
Jacques Cartier
3
Zheng He
3
James Cook
3
Vasco da Gama
3
Edmund Hillary
4
Maddy's Iowa Diary
3
Francis Drake
3
David Livingstone
3
Magnetism
3
Sacagawea
3
Isthmuses of the World
3
Neil Armstrong
3
Roald Amundsen
3
Ibn Battuta
3
Jacques Cousteau
3
Amerigo Vespucci
3
John Cabot
3
Juan Ponce de León
4
Table Mountain, South Africa
3
Daniel Boone
3
Samuel de Champlain
3
John Smith
3
Ferdinand Magellan
4
Maddy's Maryland Diary
3
Leif Erikson
3
Marco Polo