My son put his music on Soundcloud, which is apparently a place where people can post their music for free, where you can listen for free. If you’re the sort of person who goes for electronic music in general or dubstep in particular, give it a listen. He recommends people start with the song “Cavernous” although I think that one, while it has a strong drop, isn’t as strong as some of the music he hasn’t uploaded. It certainly has an unpromising start, IMO, but it’s his music.
And lest we forget, he’s 12. so please don’t be rude about the work he’s doing.