We would have to say never to this question because Halloween is fun for everyone. There is no set rule for when kids stop trick-or-treating because of age, but in general, they stop wanting to go around the teen years because they may feel it is too childish. As long as there are younger relatives in the family to bring around for treats, teens may still want to go as a supervisor for the little children. In this way, they can still go and have fun around the neighborhood.