My MIL used to make the most beautiful cards pre-dementia. She still shows an interest and shuffles through her vast collection of card making stuff from time to time. She clearly still wants to make some Christmas cards, but really has lost her skills now, and seems at a loss where to start. So I thought I'd try something to do with card making with her.
A couple of days ago, I went to a well-known craft making shop and bought some more 'kit' for her, but a lot less sophisticated compared to what she used to buy. For example, I bought some ready-made die-cut shapes that are easy to stick straight on to the card. Anyway, we spent a pleasant afternoon together opening packets, examining the contents, and trying out different combinations of shapes, stick-on buttons, sentiments, backing paper and what have you. At the end of the day, we made about a dozen cards between us. Well, I say 'we' but really it was MIL 'advising' about colour and shapes etc. and me actually making the cards!
It doesn't really matter who did what, the main thing is she really seemed to enjoy the process. She has even offered to help me make my own cards when I'm ready!