Love Street Playhouse presents “Small Potatoes,” written and directed by David Bareford, playing Friday through March 15 at 126 Loves Ave., Woodland. The family drama explores the tension between ambition and responsibility, telling the story of Cosmo Langtry, a charismatic dreamer who tries to provide for his struggling family in Depression-era East Harlem with an invention that he’s certain will make millions. But maybe the real riches are fou…