Abby Sumner, 9, a fourth-grader at High Lakes Elementary, performs speed stacking of cups from a push-up position during Barb Bouck’s physical education class Thursday morning. Sumner and other students in Bend-La Pine Schools, including 531 from High Lakes, participated in the seventh annual World Sport Stacking Association’s “Stack Up!” event in a bid for a Guinness World Record, with participants around the world stacking for at least 30 minutes. Last year’s record reached 412,259 participants. As a PE teacher, Bouck said she made sure the students kept moving throughout the 30 minutes to keep both the brain and body active.