Kids are, for the most part, the worst. Are they little bundles of joy that are capable of seeing the world in strange and beautiful ways? Sure, whatever -- they're also gross and cruel tiny monsters a lot of the time, so upcoming horror comedy Cooties, which centers on a zombie virus that only infects people who haven't gone through puberty, has a lot to work with. At the very least, the movie, directed by Cary Murnion and Jonathan Milott, has assembled a great cast of teachers looking for revenge, including Elijah Wood, Alison Pill, Nasim Pedrad, and a delightfully over-the-top Rainn Wilson. Check out the trailer for Cooties, which hits theaters and video on demand September 18, below.