It’s a real treat when you can enjoy hanging with your kids in a setting that’s actually cool for grownups. Today’s birthday contest allows you to do just that via tickets to the first Kids Summer Music Series presented by the Regattabar at the Charles Hotel in Harvard Square (the series runs every Sunday from July 22 – August 12). Four winners each will receive a set of four tickets to one show. Enter to win a set of tickets by emailing us (by midnight EST tonight) a list of which shows you’d love to attend.