The Mocha Moms' annual benefit party will takes place 3 to 5 p.m. at Der Schwarze Koelner, with music, food samples, giveaways, games, and kid-friendly yoga. Bright donations of cash or gently used toys for Little Essentials, a not-for-profit devoted to helping Brooklyn's many impoverished families that are expecting newborns or need help providing for infants.