New York City children have arrived in Ridgefield to spend one or two weeks with volunteer host families in New Canaan, Redding, and Ridgefield.  The Fresh Air Fund Southwest Coast Connecticut Committee welcomed the children at Jesse Lee Memorial Church on Friday.  The children are aged 7 to 18.  Some children are leaving home for the first time, while others are returning to visit the same host families for consecutive summers.  The Fresh Air Fund, a not-for-profit  has provided free summer experiences to more than 1.8 million New York City children from low-income communities since 1877.