Sudden after my first project calendar on June 2006, I was much more hopeful and generated a lot curiosity about the desktop application. So I suddenly tried to collect some ideas for my hobby product .
One friend showed me a amazing trick of the card. He used 21 cards and divided into three subdivision, each of 7 cards. Now we have to remember any one of them and keep in our mind. And we have to do is that to point the group of card which it belong. Now he again keep those cards and again divided into similar kinds of group again, and we have to point the group of that card it belong. On the third iteration, the result is out, showed the card that we have guessed. I was amazed by these tricks and learned to do the same in card as well as implemented it on the program. Check it.