White House for Kids, mostly great

This site focuses on White House current events and history. In the games and quizzes section, quizzes cover varied topics from the U.S. Constitution to pets. Both correct and incorrect answers come with a brief history lesson.

The Math Challenge questions (one challenge at a time) are difficult, requiring paper and pencil even at the elementary school level. That's not a big deal but you can't leave the challenge until you answer correctly. Unfortunately, incorrect answers don't lead to clues or mercy on the part of the challenge-giver. This game needs a clear exit strategy!

The rest of the site is fun and worthwhile.