Yeah, my grandpa told war stories.
My grandma has a special interest, so I try not to fall asleep when she volunteers information about that.
I've been reading about smallpox, so I asked grandma about it, because she was growing up back when it was still around.
Sometimes I talk about my writing. I keep it at a rather superficial level and encourage attempts to relate it to something interesting to her or something she's knowledgeable about.
You might talk about your friends, if you have friends and if you've had a brief, easy-to-describe funny incident involving them, recently (last week or two, or last day or two if you see them more often), which doesn't require a lot of specialized knowledge.
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I'm using a non-verbal right now. I wish you could see it. --dyingofpoetry
NOT A DOCTOR