Warm and Cool "Pop Hearts" for Valentine's Day

I just love making art with kids.  This past week we held an art day at my children's elementary school.  I spent the day making art with the whole school and we had a lot of fun.
For the younger grades (kindergarten through third grade) project we made "Pop Art Hearts" by using warm colors (reds, oranges, pinks) and cool colors (blues, greens, purples).


I taught the kids about warm and cool colors and then had them create two pop masterpieces using oil pastels on white construction paper.  For their first piece, they created a heart and used at least three warm colors inside it.  Then they used at least three cool colors on the outside.  If they had time, they made a  second piece, using the same techniques, but by flipping the colors  (cool on the inside and warm on the outside).

When they were done, some of them used a dark color (dark blue, purple or black works well), to outline their heart, making it "pop" even more.  

As you can see, they each made something totally unique.  Each heart looks great on its own but they look even better together.  The school now has a bunch of colorful pop hearts lining the walls, getting everyone in the spirt for Valentine's Day.