Join the McKinney Rocks organization on the Heard-Craig porch for an hour and create a piece of art, suitable for sharing locally or around the world. Open to the public...join us on your way home from the McKinney Farmer's Market. Bring $2.00 and 3 smooth rocks. Children must be accompanied by an adult. Register here or pay on the porch (Front porch of the Heard-Craig Center for the Arts, 205 W. Hunt Street, downtown McKinney).