I have volunteered to fix up this Maxtone nylon string guitar. It looks like a pretty low-cost item, so I will not spend too much time on it.
The neck has a crack, cause unknown, before I pointed it out, the owners did not even know it was broken.
The fingerboard appears to be not real wood, probably why the frets are loose. I am hesitant to use superglue, but on a guitar such as this, it is probably OK to glue the frets down.
The tuners are a very rattly fit in the head, but I will ignore that.
So, Epoxy the neck, see if dowels are required, press and glue frets, do a simple fret level job, new, cheap-ish strings. The grandchildren will probably eventually destroy it anyway.