So keep it until she dies. Let her enjoy it. Maybe the kids will want it, maybe they won’t.
Try contacting college / university art museums. They’re usually very interested in anything that has teaching value, and if it’s from a culture that isn’t otherwise represented in their collection, so much the better.
My mom is convinced her limited edition prints are worth thousands. They are worth tens, if that. But the belief is satisfying to her, and the facts will make certain decisions easier when the time comes.