I throughIy enjoyed this site. I spent 20 minutes checking out this site of three glass cups. I was confused, at first, about the whole point of the game because I have Math issues. However, after getting totally frusterated and loosing paitiece (after about 15 minutes) I looked at the answer and it made complete sense. I then enjoyed going back and doing it knowing that it could be solved and that I could actually do it. Thanks for the brain exercise. It was fun.