Here's a cute hand print monster I'm sure you've seen before. I used green paint on the palm and black paint on the fingers. (I didn't paint the thumb at all.) After the kids made their print, I painted a little green neck.
This one isn't a craft, but it's a fun thing you can do in the classroom. I brought in a skeleton, named Mr. Bones, and taped him to our bathroom door.
I shared this craft last year, but they are so stinkin' cute, I wanted to share a picture of how they turned out this year.