BLUE MOON SIDEWALK PAINTING FESTIVAL -- Today, 9 a.m.-5 p.m. Learn street painting in the style of the Italian Renaissance. Create your own masterpiece or help make a 70-foot mural of the solar system. Meet by the Clarendon Metro. 1116 N. Hudson St., Arlington. $20. For reservations, call 703-528-4800.
MERLIN AND THE CAVE OF DREAMS -- Today at 12:30 p.m. and 3:30 p.m.; Tuesday and Wednesday at 10:30 a.m. A play that draws from the legend of King Arthur. After a young Arthur discovers he was adopted, the wizard Merlin guides him on an exciting adventure. Imagination Stage, Lerner Theatre, 4908 Auburn Ave., Bethesda. $7.50-$12. 301-280-1660.
FESTIVAL OF BOOKS -- Today, 1-4 p.m. Ages 4-12 with an adult. Authors and illustrators from the Children's Book Guild of Washington are joined by Norwegian author Mette Newth and Iceland's Godrun Helgadottir for an afternoon of readings, book signings, art activities and more. National Museum of Women in the Arts, 1250 New York Ave. NW. Free. 202-783-5000.
ANIMAL HUNT -- Tuesday-Thursday at 2 p.m. Ages 6-14 with an adult. Search for animals in the Sackler's "Arts of China" exhibit, then make an animal mask to wear home. Arthur M. Sackler Gallery, classroom, 12th Street and Independence Avenue SW. Free. 202-633-1000.