I don't know why my physio didn't suggest it to me earlier but I have stumbled upon jigsaw puzzles for therapy. The repetitive movements of sorting pieces has done my lymphedema arm the world of good....
In my adult years, my Mum often had a card table with a jigsaw on the go. It's something we have done with the kids for years - they often got a jigsaw for Christmas or birthday presents gradually getting more difficult and more pieces. Sadly, mostly sent to childish things, now. Always good to get quality jigsaws.