Moved into fixer-upper. Kid's bathroom has a keyed lock and, of course, we were never provided with a key. Today one of the kids accidentally locked it and closed it and now we are locked out. Don't worry, kiddo isn't trapped in there.
We've got more than enough to fix and don't want to add a broken door to the list. I'm open to trying anything and don't mind buying some tools if necessary.
SUCCESS! Enormous thanks to everyone for their input. I am actually getting the Gensis set from Covert Instruments and some practice locks too. Sometimes Reddit really is great thank to people like all of you.