We used Crayola® Model Magic® to form the hearts. This dough is so much fun to play with. The best way I can describe the consistency is to liken it to one of those orange circus peanuts--only a little more pliable. It does dry out, but again, like a dried circus peanut. Not like the flour doughs many of us create with.
We rolled some out and cut shapes with cookie cutters.
The great thing about working with Model Magic® is that you don't have to wait for the project to dry to paint it. We used watercolor panit sets, but really, just about any paint will work.
After the shapes have dried, we added simple magnets with sticky backing to the back of each shape. They always turn out quite nicely.
When giving these as a gift, I like to let the kids dip the cookie cutters in tempra paint and decorate a paper lunch bag for wrapping paper. It adds a really nice touch!