TodayEXHIBIT Forging Mideast Peace in Silver Spring?Tunisian Muslim painter Karim Chaibi and Jewish American painter Tom Block, who share an interest in Sufism, seek connections between two cultures often portrayed as divided in the Heliport Gallery exhibition "Convergences: Towards a Jewish/Muslim Renewal," which spotlights shared history and traditions. Chaibi looks at the similarities between Jewish and Muslim law, while Block investigates the links between Jewish and Islamic mysticism. Free. Tuesday-Friday, 4-7 p.m. Through April 9. Heliport Gallery, 8001 Kennett St., Suite 3, Silver Spring. 301-562-1400. ON STAGE A Cacophony of Sound"Kid-Simple: A Radio Play in the Flesh" is writer Jordan Harrison's tale of a child prodigy who aims to "save sound" after her science project hearing machine (which can exceed the human range) is whisked away by a mercenary. Forum Theatre and Dance, which melds theater, dance, music and visual art with the goal of creating experimental performances, puts on the play. $16.50-$19.50. Tonight and tomorrow at 8, also tomorrow and Sunday at 2. Round House Theatre Silver Spring, 8641 Colesville Rd., Silver Spring. 800-494-8497.

TomorrowFOR FAMILIES Great Train Expo Rolls Into TownThe still nascent expo, a traveling show that features model trains (including some that kids can operate themselves), exhibits and dealers aimed at railroad enthusiasts, will be at Show Place Arena for a two-day stint beginning tomorrow. $7 (good both days); children 11 and younger free. 10 a.m.-4 p.m. tomorrow and Sunday. Show Place Arena, 14900 Pennsylvania Ave., Upper Marlboro. 301-952-7999.

LITERATURE Annual Afrocentric Book EventThe Mall at Prince Georges will be the site of tomorrow's Afrocentric Book Expo, a gathering of writers and book-industry types that this year will focus on self-improvement and the writer as community figure. Workshops include sessions on getting your manuscript out and marketing your book. Entertainment includes dancing, poetry and a theatrical performance. Free. 10 a.m.-5 p.m. Center Court, 3500 East West Hwy., Hyattsville. 301-559-8844.