The Fairfax Station Railroad Museum will hold its 24th annual Holiday Train Show on Saturday, Dec. 7 from 10 a.m. to 5 p.m. and Sunday, Dec. 8 from noon to 4 p.m. N, HO, LEGO, O, Standard, Z and G scale model trains will be on display and running. The "Train Doctor" will be available to fix broken model trains. Weather permitting, antique cars will be on display. The Museum Gift Shop will be open and Santa may make a visit. The Museum is located at 11200 Fairfax Station Road in Fairfax Station. Adults 16 and over, $5; children 5-15, $2; 4 and under, free. www.fairfax-station.org, 703-425-9225.