COMIC BOOK CONSCIOUSNESS -- Today, 2-4 p.m. See the art of Kerry-James Marshall and invent a superhero who solves a social problem or reflects your culture. Baltimore Museum of Art, 10 Art Museum Dr., Baltimore. $7, seniors and students $5, children free, first Thursday of the month free. 410-396-7100.

ARCHES AND TRUSSES -- Today and July 4, 2:30-3 p.m. Work in a team to build an arch after learning about different building materials. National Building Museum, 401 F St. NW. Free. 202-272-2448.

MERLIN AND THE CAVE OF DREAMS -- Wednesday at 10:30 a.m. and Saturday at 3:30 p.m. Through Aug. 15. Ages 7 and older. 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.

IMPROV ART -- Thursday, 4-6 p.m. Ages 5-11 with an adult. An exploration of modern sculpture through a self-guided tour of the Hirshhorn, followed by a workshop in which kids can sculpt their own art. Hirshhorn Museum and Sculpture Garden, information desk, Seventh Street and Independence Avenue SW. Free. 202-357-2700.

POPOL VUH -- Friday and Saturday at 12:30 p.m. Ages 8 and older. The epic creation story of the Maya of Guatemala in an animated film, based on images from Maya pottery. National Gallery of Art, East Building, Auditorium, Fourth Street and Constitution Avenue NW. Free. 202-789-4995.

CLIMB ON -- Saturday at 10 a.m. Learn the ropes of

climbing at Discovery Creek's climb wall. Discovery Creek Children's Museum, Glen Echo Park, 7300 MacArthur Blvd., Glen Echo. $5, younger than 2 free. 202-337-5111.