Shorten pajamas with first aid tape
Kendra's quick, no-sew pajama-hemming hack:
We're big fans of superhero PJs and sleep pants, but we either have to buy several sizes too big to even get a pair (e.g. Life Is Good lounge pants) or the buggers are simply far too long.
After about the millionth cuffing / quick-basting / waistband rolling gave out, I found a better way: Nexcare first aid tape! I use the 1-inch wide Flexible Clear Tape. I turn the pants inside out, fold to the right length, and tape the cuffs down all the way around. The tape has made it through multiple washes (even on shrink-prone cotton pants) and I can remove it and lower the "hemming" as the kids grow. You can see a flat line where the tape is once the pants are turned back around, but since it's PJs, no one cares. And the tape is bendy enough that even my super-sensitive eldest kid doesn't mind how it feels on his legs.
We got our tape at the local grocery store. I've seen it in several big-box pharmacy stores too.