The Fond du Lac Police Chief says he believes kids started a fire that damaged a Fond du Lac High School concession stand restroom last week. Chief Aaron Goldstein says a $5,000 reward is being offered for information leading to the arrest of the person or persons responsible. Nobody was injured in the fire last Wednesday afternoon. The Wisconsin Arson Tipline is 1-800-362-3005. The Crime Alert Line is (920) 322-3740. You can remain anonymous.