If that doesn't work, tell him that Auntie Phyl has a few friends who would like to visit. There are THOUSANDS of spirits who like to deal with naughty children. I think
Joseph Bruchac wrote a book of horror stories based on Native spirits. I don't remember it off the top of my head, but...
Oh, Nan... Could you see if your library system has a copy? :D Go raibh maith agat aris.
Phyllis (aka Sidhe Uaine or
Gaia Euphoria)