A fun flash game:
http://home.cwru.edu/~jnt5/Planarity/
You start out with 6 connected dots, but the connections cross. You need to move the dots so the connections do not cross. Then you repeat with 10 dots, then 15 dots, etc.
A fun flash game:
http://home.cwru.edu/~jnt5/Planarity/
You start out with 6 connected dots, but the connections cross. You need to move the dots so the connections do not cross. Then you repeat with 10 dots, then 15 dots, etc.