You're on Ravelry, aren't you?
First thing I thought of was a skull sweater - a couple cute ones at Ralvery, 1 in a Knit 1 magazine, 1 from a book. But you can find plenty of skull charts on the web and use any sweater pattern.
or how about
:
http://alison.knitsmiths.us/pattern_nbat4kids.html