Over the holidays, my older son (David Ricardo Palmer) told us that if we put a circle on the floor, the cat where we were all chatting would go sit in it. He showed us all the images here of cats sitting in circles or hexagons.
So we decided to try it. We got some duct tape and put a hexagon on the carpet.
The cat at that place would have nothing to do with the hexagon. It may have sniffed at it once or twice, but that was about it.
However, the daughter of my younger son (Adam Smith Palmer) went right to the hexagon and stood in the middle:
We all had a good laugh about how the hexagon was more of a toddler trap than a cat trap.
But the laughing stopped when they finally got around to lifting the tape a few days later. Much of the adhesive was stuck to the carpet and the adhesive residue began collecting dirt. :-( You can see the outline in this photo.
Fortunately it looks as if several goes at the adhesive with GooGone has cleaned it up pretty well.
So if you're going to try cat circles on your own, maybe use a rope or something.... or at least remove the tape before people have walked on it for several days.