The children will be intrigued in cartoons or superhero stories and adults would be interested in realistic things.
A simple way to lookup for said forums is to kind "writing discussion board" into a lookup engine's search box.
Been there, carried out that and have a B.A. an M.A. and a Ph.D. to prove it. Are you searching for a rural setting or an urban one? The handbook is the student's bible and should be read carefully.