Collegium Musicum. "Then and Now," a concert featuring the ensemble, the Chamber Singers and soloists. Pleasant Street Congregation Church, Arlington on Saturday, March 19 at 8 p.m. $5 for students.

Exhibitions

The Children's Museum. 300 Congress Street, Boston. 426-8855. Current exhibits include: the Climbing Sculpture, a two-story suspended puzzle piece climbing maze; Climbing the Wall, a rock climbing exhibit; El Mercade De Barrio, a replica of Latino neighborhood market in Boston; Teen Tokyo, an exhihbition on fashion, food, sports, music, art and school and family life for kids in Japan; Columbus: Through Native American Eyes. a reexamination of the discovery of America from both Columbus' and the Native American perspectives.

Museum of Fine Arts. 465 Huntington Ave., Boston. 267-9300.

Through March 27. Three Centuries of Flemish Tapestry.

Through April 10. John James Audubon: The Watercolors for the Birds of America. 90 rarely seen watercolors by the focus of a major traveling exhibition.

Through Mar 1. The Label Show: Contemporary Art and the Museum, an exhibition of 20 works from the permanent collection.

Through June 19. Early 20th-century Prints: Picasso to Johns. This exhibition traces the course of printmaking in the first half of the twentieth century.

Through July 3. African and Oceanic Sculpture: Treasures from a Private Collection. The objects are mostly wood and terracotta, ranging from a miniature wooden mask from Zaire to monumental yoruba veranda post from Nigeria.

Museum of Science. Science Park, Boston. 723-2500. Through May 15. Mysteries of the Bog. an exhibition of an ecosystem native to North America and Europe.

Through May 1. Who dunit? The Science of Solving Crime, featuring exhibits on fingerprinting, DNA profiling and forensics.

Through Aug. 21 Darkened Waters: Profile of an Oil Spill.

Movies

Brattle Theatre. 40 Brattle St., Harvard Square. 876-6837. "My Life to Live" at 4:15 and 7:45 and "Two or Three Things I Know About Her" at 6 and 9:30 on Thursday, March 17. "Why Has Bodhi-Dharma Left for the East?" at 4:45 and 7:30 on Friday, March 18 through Sunday, March 20, with Saturday and Sunday matinees at 2 p.m. "Between the Teeth" at 10 on Friday, March 18 through Sunday, March 20. "Mona Lisa" at 3:45 and 7:50 and "The Long Good Friday" at 5:40 and 9:45 on Monday, March 21. "Blade Runner" at 3:30 and 7:50 and "Total Recall" at 5:40 and 10" on Tuesday, March 22. "Citizen Kane" at 7:45 and "Psycho" at 9:55 on Wednesday, March 23.

Loews Fresh Pond. Fresh Pond Plaza. 661-2900. On "Thursday, March 17. "Lightning Jack" at 12:20, 2:40, 5, 7:10 and 9:35. "The Ref" at 1, 3:10, 5:30, 7:50 and 10:10. "Guarding Tess" at 12:45, 2:55, 5:15, 7:35 and 9:50. "Angie" at 12, 2:25, 4:45, 7:25 and 10. "Greedy" at 1:40, 6:55 and 9:20. "The Chase" at 1:55, 4:20, 6:25, 8:25 and 10:30. "Philadelphia" at 12:30 and 6:40. "Sugarhill" at 3:55 and 9:10 "On Deadly Ground" at 1:25, 3:40, 6:10 and 8:40. "Ace Ventura, Pet Detective" at 12:10, 2:10, 4:05, 6 and 8:55. "Reality Bites" at 1:10, 3:25, 5:45, 8:05 and 10:20.