Over the past few years, Heidi Swedberg, perhaps best known as the actress who played Susan, George"s fiancé, on Seinfeld, has built a national reputation for her ukulele-inflected, highly interactive approach to family music-making. Drawing from "a crazy diverse bunch of songs" that she loves to perform onstage and with her music classes, My Cup of Tea swings from classic family fare like The Owl and the Pussycat and Comin" Round the Mountain and a Latin lullaby, "Duermeté; to the Civil War song Johnny Martin; and a Haitian Creole tune, Wi Wa. For both My Cup of Tea and her earlier release, Play, the result is a collection of tunes that is as sly as it is sweet. With every show, Swedberg proves that her light touch and slightly ironic retro style easily engages audiences from 3 to 93.