grade - A great way to teach value. A white highlight that gradually tints into a color as it expands from the subject. (Degas) I love this ballerina one, but love this idea for any kind of silhouette.
*Colored ice balls* Fill balloons with water and add food coloring- red and green would be great around christmas! (be careful not to let the food coloring escape!), once frozen cut the balloons off and voila! Look like giant marbles :)