I'm looking for a novel I read back in 2003-05. It might have been classified as a "young adult" novel although some parts I remember as being kind of graphic.
The novel begins with an alien child that assumes the form of a normal human, and who lives with his mother and some other immediate family. His mother explains to him how using his alien powers is very dangerous. He escapes his house and then travels to some kind of circus or fair with his grandfather (?) who is arrested and thrown into jail or some kind of pit. The child, or possibly his grandfather (or both) then uses toilet paper to make patterns on the walls of his cell/room which in turn causes them to travel time/space into an alternate Earth.
Once on the alternate Earth, things start to get really weird. The child finds out that his mother has been turned to stone, his sister is pregnant and smokes, and no one is around to tell him what to do. So, of course, he begins murdering everyone, using his unlimited alien powers. He then creates some kind of friend or lover (?) and they have lots of intercourse. After this, I don't really remember what happens. I know there wasn't much left in the novel after that point.
I tagged this as hard-sci-fi because I do remember the story going into great detail on how exactly they are able to construct a time machine out of toilet paper.