The boys have both YuGiOh and Pokemon cards, but for some reasons, they have been more into Pokemon cards latey.  They would battle or trade cards with each other whenever they had time and while we were watching Olympics.  They could be very content and quietly played for a long time.  When Rohan brought over his cards to play on Saturday, they were in a folder with trading cards binder covers, and the boys were envious.  When we were out to run errands later, we made a trip to pick up those folders for them.  The boys were so happy, and they even commented that it was the best day ever.  They could not wait to place their cards into the pockets  Since then, they hug the binders dearly, and carry them everywhere we go.