Conversation Heart Cheesecakes    Ingredients:    1 cup graham cracker crumbs (15 squares)  pinch of cinnamon  1/2 stick butter (melted)  16 ounces (2 blocks) cream cheese, softened  1 cup sugar  3 large eggs  2 cups sour cream  1 teaspoon vanilla extract  food coloring - pink, purple, blue, green, yellow, and red