Positive and negative

Initially, I was looking for a Halloween project (which I normally stay away from), but found this on Pinterest. 3rd, 4th, and 5th graders started off talking about positive and negative, then we talked about how it's used in Art. 

We started with a 9x12 black paper, a 6x9 colored paper, pencils, scissors, and glue.  They drew half of an object (good time to revisit symmetry!) and cut it out.  We glued the pieces on opposite sides. 

Next, we added details, lines, and patterns with permanent marker and white colored pencil.