Here's a fun Halloween themed illustration created by CGHUB artist aamirart. It features a little girl and a monster having a little rowdy slumber party. The artist says the CG art is based on the Marco Bucci illustration which I've included below.
maybe using the eyes as a focal point. Just think every kids idea of a monster is different, so a silhouette and eyes could work better. From Maurice Sendak tribute site Terrible Yellow Eyes, by Robert van Raffe