Dental floss container as yarn cutter
Are you or your kid into knitting or crochet? Fantastic hobby that's creative, calming, inexpensive, portable, quiet, productive, and requires no batteries or headphones. I could go on and on about what crochet has done for me lately (maybe I will in another post), but for now, a hack I learned from an employee of my favorite Portland yarn store:
If you like to knit or crochet while on a plane, a dental floss container is a TSA-friendly alternative to scissors.