What exercises are there that target this particular area (details)?

My mother is always obsessing about how fat her neck is and how she’s got a double chin and everything (neither of which are true). So I was wondering if there were any exercises that she could do to trim up her neck and make her feel better about herself. I know there’s not much one can do with their head, but there has to be something right?

P.S. She’s not into surgery or anything so I would appreciate it if those comments were left out. Thank you!