I need help. Don’t know what chat room tho

So my grandma was diagnosed with cancer. Shes getting surgery next week and we have no clue if it’s bad or not. Anyways she wants to know what to get me for Christmas and usually my moms just tells her money and gift cards. But this year I’m trying to think of something I can remember her by just incase something goes wrong. And if everything goes well, that’d be great, but it could just be for the future has everyone’s time comes eventually. What r some ideas? I’m think maybe a necklace or something. Idk tho.. and I’m wondering what I should get her, tho not as much cuz I usually have good ideas and my mom can help me out better With that one