An expensive pieces of cardboard (normally £5/$8) that are cool for about 10 minutes until a new type of cards come out and then they will have thrown their cards away or left them for about a year and sold them on e-bay.

Such cards include card games, sports cards, and movie sponsor cards, but not standard playing cards. They are usually paper or cardboard based, and have a distinct lack of any electronic and/or external stimuli. This is likely the reason for the major lack of appeal.