Thank you, LHG and jayjay, for replying.
I appreciate the links, jayjay.
I wonder, too, LHG, about old friends. Some never respond to pms. Must have moved on.
Somehow, out of the blue, I recalled a pile of blocks, precariously mounted, on an old issue of RW's Free Minds Journal. I knew it had an unusual name. So I GOOGLEd "wooden block puzzle," backwards and forwards. It wasn't till I added "tumbling" that I finally got Jenga.
Best Wishes.