Three-year-old Ashtin Wallace, right, cuts his eyes as Vicksburg National Military Park Ranger Tim Kavanaugh walks behind him and Niklas Polson, 14, during Junior Ranger Day Saturday. Kavanaugh was telling the boys, among 142 who took part, how to stand at attention in formation as enlisted men in the Confederate Army. Ranger Day invites children to explore, protect and learn about the nation’s parks. Niklas is the son of Mike and Maggie Polson; and Ashtin is the son of Josh and Kim Wallace.