My Mother has some visual impairment, so keeping her busy is tough. She used to read, knit, garden and was very involved with volunteering. Now, I play audiobooks for her on the tablet, and we listen to and discuss the news a bit. She has a hard time following news, books or much of anything. I play jazz and classical music quite a bit, and we put "Antiques Roadshow" on the TV every Monday night. We also put on musicals whenever they are on the classic movie channels. My Mother is not confined to bed, as I sit her in a chair every day, but she is unable to move without considerable assistance. For use in bed, I would look for a couple of tables or trays that you could use to play cards, or spread out photos on.
Even though she has visual issues, I just tried bringing home a game called "Qwirkle" recently. It has wooden tiles with colored shapes on them, and you play it by making rows of colors or shapes. There is no way she can play the game without a good bit of help, but she can see the shapes and colors enough to follow along. I don't use any of the complicated rules, and we don't keep score, but it keeps her busy. She does well at lining up the shapes and colors, but usually gets more than one copy of the same tile in the same row. Hopefully her carers can help her with it too.
I am watching this thread, as I need some things my Mother can do while confined to a chair. Hopefully a lot of the ideas will work for both of us.