Bryan Berg - Cardstacker. He makes amazing creations of architecture with cards. His latest record-holding structure in the category is over twenty-five feet tall. You can buy some decks of cards on his site but an advice: Buying and using these cards may not make you a professional cardstacker like Berg. Cardstacking is like many other pursuits which take talent, practice, patience, and perseverance. I'm sure that this isn't for me.