4

Brandenburg Gate, Germany

4

U.S.S. Arizona Memorial at Pearl Harbor

3

Anne Frank

2

Country Flags of Europe

3

Heat and Temperature

4

Chip's Tips on Switzerland

3

Martin Luther

4

Chip's Tips on Rwanda

3

Ludwig van Beethoven

3

Pablo Picasso

3

Florence Nightingale

3

Hanukkah

3

May Day

3

Meteorites, Meteoroids, and Meteors

3

Rivers of the World