Jennifer and Taylor Toole, of Arlington, announce the birth of a son, Jasper James Toole, born on March 27 at Mount Auburn Hospital in Cambridge. Jasper weighed 7 pounds, 12 ounces at birth. He joins big sister Charlie and is welcomed by grandparents: Marney and Richard Toole, Molly and Andrew Silverman, and Amy and the late Kevan Hirsch.