Lichtenstein, a famous comic book artist, used tiny circles to make larger pictures. This can be a great project for older students, challenging those in high school and college art courses. Students will have to exercise patience as they "color in" the art with circles to make the entire painting complete.
Give younger students circles or have slightly older students the bottom of cans or protractors to make circles. After the students cut them out, ask the students to give them eyes, a nose and a mouth and attach yarn or other paper to make a face. You can challenge students to make a self-portrait or a portrait of family members, friends or their pets.
The moon travels through a cycle each month and you can combine this knowledge with arts and crafts to help your students learn more about astronomy. Have students create a moon cycle using circles and then hang up the moons on a hanger or a poster board. Ask students to label each moon phase and write a little something about it.
Planets are more or less circular, so students can use circles to make a model of the solar system. Ask students to cut planets out of construction paper or use Styrofoam balls placed on a hanger to make our Solar System. Just like with the moon craft, ask students to label each planet.