Javier Rubio, (above) 12, a student at Helen Tyson Middle School, quickly unstacks cups Thursday during “Stack UP! 2012” at the school in Springdale. The event is an attempt to break the world’s record for largest sport stacking event. The students are working with others around the world to break the record during a 30-minute time period. Last year’s record was set with 412,259 stackers