Nineteen-month-old Giovanni Mason looks out the door of the igloo his family built over the weekend at their home in Concord on Feb. 14, 2017. The snow structure was built block by block out of packed snow using a mold. (ELIZABETH FRANTZ / Monitor staff)
Nineteen-month-old Giovanni Mason looks out the door of the igloo his family built over the weekend at their home in Concord on Feb. 14, 2017. The snow structure was built block by block out of packed snow using a mold. (ELIZABETH FRANTZ / Monitor staff)

For five hours on Sunday the Mason family built an igloo in their backyard, block by block, out of packed snow. The idea came from a visiting aunt who had brought an Icebox Igloo Building Tool for the task. The snow structure is over 6 feet tall and provides plenty of play space for 11-year-old Teigan, 6-year-old Vincenzo and 19-month-old Giovanni.