This won't be as great as yours - however, that good old mothball smell will always remind me of my 90 yr old grandma.
I have long since stopped taking my DD, 9 to see her great-grandmother. DD finally asked me why - and I told her. DD asked me if it was a medical fact that mothballs were a health hazard, or was it my opinion that they were a health hazard. We did an internet search - and yes, they are a health hazard.
We recently moved my grandma into an assisted living apartment. I personally threw out 6 or 7 boxes of mothballs. Eeewww.