Have you ever seen a toddler straight jacket? I guess I shouldn’t call it that. It sounds cruel and I’m sure that horrible horror movie images come to mind but it’s basically what my solution is for keeping a kid in their diaper at night.

When your diaper baby starts to break out of their diaper in the middle of the night, which seems to happen between 1 and 2 years old, the best solution I’ve come up with to stop them is to zip them into their pajamas backwards. By cutting the feet off some zip up pjs and making it possible for them to wear them backwards you can zip them in backwards. Without the ability to reach the zipper they have no way to escape and are essentially locked into their clothes until you free them the next morning.
This was the only solution that kept both my kids from either peeing outside of their diapers or taking whatever was in their diaper and putting it around their room.
TMI i know but believe me you’ll be gad you don’t have to clean up toddler poop from their rooms!
(Image of my son from 6 years ago)