Australian artist DrFaustusAU has taken the classic Dr. Seuss style and mixed in some classic horror, resulting in a frightfully faithful way to introduce your kids to scary stuff.
What started as imaginary covers soon turned into full-blown retellings of classic H.P. Lovecraft tales "for beginning readers," including The Call of Cthulhu, The Tomb, and Dagon (this one is done in the style of Tin Tin). These are fully illustrated, full-length retellings of the classic tales.
Besides stories, DrFaustusAU also blends decidedly more adult pop culture references into a Seussical soup. My favorites include his versions of Evil Dead and Silent Hill.