The puzzle starts out looking like this:
And ends up like this:
The goal is to draw as many "bridges" from each circle as the number within the circle suggests. You may not cross another line or circle, and every circle must be connected by a continuous line. Sound like fun? Oh, it is! The site I've been playing on tonight is http://www.conceptispuzzles.com/index.aspx?uri=puzzle/hashi.I'm not including these in my logic puzzles as I have NO idea how to create my own, but I find them very addictive.