Kids

MODEL TRAINS AT NATIONAL HERITAGE MUSEUM All aboard for the Northeast Ntrak Modular Railroad Club’s two-day choo choo of freight cars and climbing trains that are smaller than traditional model trains. Feb. 16 from 10 a.m.-4:30 p.m., Feb. 17 noon-4 p.m. $7 family (museum is free). National Heritage Museum, 33 Marrett Road, Lexington. 781-861-6559. www.nationalheritagemuseum.org