Have you ever noticed that cats are very fond of circles? Well, some users on Reddit and Imgur shared pictures of their cats loving circles, and this lead to the ‘invention’ of some low-tech traps, which can be helpful at times.
Beside circles, cats are also attracted to boxes. One possible reason why cats might be attracted to these things is their need to feel secured. Cats love small and safe spaces, so even the suggestion or illusion of one may prove more appealing to them.