I put a pinboard in Mum's room with a small whiteboard section. I write on it who will be next visiting and when. Sadly, Mum can only read the words now, but not assimilate the information. However, it's useful for the carers to remind her of visits and make sure she is ready for them.
A couple of other ideas that might be useful:
Silk flowers/plants - less bother than fresh, but Mum kept trying to water them.
Battery operated candles with timer. They flicker safely and effectively and turn themselves on for 6 hours then turn off. The CH love them, however, Mum keeps removing and hiding the batteries
.
As Mum's condition has deteriorated, she no longer appears to gain comfort from soft toys etc. Even her robotic cat (they were inseparable) is put to one side.
I really think Mum's ideal gift would just be a box of tissues that she could take and fold, and fold again and shake and fold again .......