MILWAUKEE — () — A family of seven was injured Saturday afternoon when their car and a North Western train collided at a crossing in Oak Creek. Two of the children were described as in very critical condition at Trinity Memorial Hospital. They are Karen, 16, and Mary Ellen, 12, children of Mr. and Mrs. Richard W. Kuester of Oak Creek. Kuester, 41, was in good condition and his wife, Vir ginia, 38, was in good condi tion. Barbara, 13, was believed to have suffered only shock. Keith, 10, and Kevin, 7, were in good condition. The crash occurred at an in tersection of Highway 100 and East Ryan Road. Police said the northbound train hit the car broadside and knocked it down a 12- foot embankment. The auto stopped 68 feet from the point of impact.