I know how it feels man, my Mom has been paralysed neck down since I was 6 after her binding pre-released. 2 years ago my family gathered up all our photos from after the accident, and put together a bunch of collages and pictures of various family members. We felt that the worst part of being bedridden was not being able to see the family often, so we decided some recent pictures can go a long way. The entire wall of the room she faces is covered in photos now.
An Ipad is good also. It opens up a ton of things to do. It also allows easy access to books. Even if she has limited hand use, they have stylus's that you can use with your mouth.
Best advice IMO is just go with what you think she will like best.