Mayor Menino, the Boston School Committee, Superintendent Johnson and partner organizations recently hosted the 10th annual "Countdown to Kindergarten" celebration at the Children's Museum. The event welcomes and helps new BPS kindergarten families prepare for a successful start to the school year. Pictured here, four-year-old Liam Rousmaniere of Hyde Park, who is entering K1 at the Franklin D. Roosevelt K-8 School, practices boarding a yellow school bus. See the photo gallery, and visit Countdown's new website! Kindergarten students begin school in Boston on Monday, September 14.