I know, I know. Hey, You and I are both ex-smokers. This is for a reason I assume because I used to like to smoke... all kinds of things. Now I don't because I want to be "here" as long as possible. There were times I enjoyed a good smoke... now I look forward to enjoying more good times. Like that grandson of yours.
You may not think of that spackle dust as dangerous but it CANT be healthy. My grandfather used to make hand-cut wooden jigsaw puzzles between 1920 to about 1970. Never smoked a day in his life. He died from lung cancer. Was it all of that really fine dust he had breathed in all of those years? Maybe, maybe not, but it probably wasn't good to do.
Wear a mask Jim.
And for the interested, the puzzles my grandfather and father used to make were packaged under the name "U-Nit Puzzles." He is in a few history books and if any of you ever come across any of these puzzles at flea markets, garage sales and so forth, please think of me? I would love to recover some more of them if I can find them for a bargain.