It would be only for games -- no internet or phone service (she had a landline that uses the amazing TeleCalm system.) I'm so hoping to find something that she will be interested in so she'll do more than sleep and roam the halls.
Is she able to learn new skills? If not, buying a new device will be a waste of your money.
My mom with vascular dementia was having a hard time dialing a phone number. She had never used a computer, so anything like that is out. My mom cannot learn any new skills (like "this is how you press a button to turn this device on." ) She doesn't retain any new information. Something you tell her is lost 5 seconds later.
We got my dad a Facebook Portal device so he can make video calls to his sisters and other Facebook Friends... It's got a great speaker so he can actually hear the conversations and see their expressions so better than using a phone. Any tablet can do this of course. We just got this because everyone he wants to talk to is already in his facebook profile. It has SOME games. It also has some TV station apps (like CBS news for example)... and it can browse the internet. Dad can barely do anything outside of the video chat and even then he needs help sometimes. But I do try to teach him how to do things on it and he enjoys it. I doubt that a regular tablet would be as easy to teach him.
My mother has lost the ability to even use a basic TV remote lots of the time, along with the telephone, and she's at the moderate state of dementia. Are you sure your mother would be able to even BEGIN to be able to deal with games on a tablet? Is she able to do crosswords or word search puzzles in books?
If you think there's a chance she'll be able to work an electronic device, I'd start out by getting her an inexpensive hand held game to play at first, like one of these, just to see how she does, or if she has any real interest for more than a minute:
My mom with vascular dementia was having a hard time dialing a phone number. She had never used a computer, so anything like that is out. My mom cannot learn any new skills (like "this is how you press a button to turn this device on." ) She doesn't retain any new information. Something you tell her is lost 5 seconds later.
If you think there's a chance she'll be able to work an electronic device, I'd start out by getting her an inexpensive hand held game to play at first, like one of these, just to see how she does, or if she has any real interest for more than a minute:
https://www.walmart.com/search/?query=easy%20hand%20held%20games
If so, you can look into getting a GrandPad at this site:
https://www.grandpad.net/overview
Good luck!