South Boston, MA., 03/20/12, The Homes at Old Colony had a ribbon cutting and grand opening ceremony today. Children from the Michael J. Perkins Elementary School performed songs for the crowd. Left to right, Chelsea Mulligan, Michael Ruemmeley, Ibrahim Bah, Lilah Gutlerner and Sofia Sai, all cq. Section: Metro, Reporter: Billy Baker Globe staff/Suzanne Kreiter