4

Brandenburg Gate, Germany

3

Hanukkah

4

Chip's Tips on Switzerland

4

U.S.S. Arizona Memorial at Pearl Harbor

4

Sheikh Zayed Mosque, UAE

2

Country Flags of Europe

3

Heat and Temperature

4

Nasir al-Mulk Mosque, Iran

3

Rivers of the World

3

Pablo Picasso

3

Martin Luther

3

May Day

3

Florence Nightingale

3

Anne Frank

3

Ludwig van Beethoven

4

Chip's Tips on Rwanda

3

Meteorites, Meteoroids, and Meteors