Or can you create them with a crayon and a piece of paper.
This is a reasonable episode with a good beginning that descends into familiar territory of an obvious twist. Apart from the crabs in the belly and blinded scenes, which are a little bit overdone, it's another slightly less than brilliant season 9 story. The little boy is good and creepy (and looks a bit like Lukas Haas from Witness), but there's not really enough here to be truly frightening or to engage anyone that much.
Not appalling, not appealing - the twist is easy to work out for anyone who's ever watched anything like this.