I need help with the care of an Alzheimer's patient.?

My Grandmother was diagnosed with Alzheimers about 2 years ago. It was around the time my Grandfather died. She is currently in the advance stages of Alzheimers. She has been checked out by a doctor and physically she is as healthy as a horse! But mentally, she's really bad. I don't think she really knows who I am. She knows I'm family but not that I am her granddaughter. My Uncle had been taking her to this Adult Day Care Center for quite some time, and they would take care of her while he was at work. But thanks to the economy, it's too expensive to take her there everyday. So my Uncle brings her over to our (my parents and mine) house. My mother takes care of her, but for most of the time she is sitting in front of the tv. My question is: does anyone know of any games, or computer games, or activites that I can do with my Grandmother that would help improve her mind? I know there is no cure for Alzheimers but anything has to be better for her mind then watching tv. Like I said she is in advanced stages so it might be a little difficult to find anything. She does react to the shows she is watching (she likes "The Golden Girls") but I want to find something more stimulating. I was ever thinking of just getting a coloring book or Candyland. Something simple that she could possibly understand. Does anyone else have any ideas or are in this situation that have any suggestions? Any help would be appreciated. Thanks.