It may not be public knowledge, but I am not a cat that gets into bags or boxes (unlike Maru).
Mom set out a small paper bag to try to entice me. Nothing doing.
Then she got an idea to put treats in the bag. I love treats. But I'm no dummy. I didn't stick my whole self in the bag to get them. I sniffed them, then reached in with my paw to bring them closer so I could eat them.