When we moved house the first thing we did was decorate dcs rooms
dd when she was just three pulled off some of her wallpaper so her room looked a mess
we told her it was wrong we were cross etc and dh mended the pulled off wallpaper
she's now four and did it again last week
her room looks a mess and makes me feel down when I see it and she picks at it at night despite getting really told off
dh says he won't spend money repapering it 
short of ripping it all off and painting I don't know what to do
it's just three strips by her pillow, the rest of the room is still lovely
she just doesn't seem to care