Watertown: Open Arts Day features family events including actors workshops, pottery wheel, watercolor painting, printmaking, quilting demos, kite workshop, poetry, and sneak previews of shows including ‘‘Charlotte’s Web,’’ ‘‘Oliver,’’ and ‘‘The Little Shop of Horrors.’’ Saturday, 11 a.m.-4 p.m. Arsenal Center for the Arts, 321 Arsenal St. Free. 617-923-0100, www.arsenalarts.org.
