To be really mean, they should design a puzzle like this, but make every piece with a square corner that looks like an edge. ;-)
Goodness gracious! >8)
I have an older friend who loves to do puzzles. Last year I sent her two for Christmas. One was a round bowl of popcorn and the other had no picture but you had to read the mystery story that came with it and then put the puzzle together based on the story. She didn’t speak to me for at least six months.
Always buy my dil a couple of puzzles for Christmas and we take them with us on our trip and work on them in the evenings. Great family activity.