Brad Nettles // The Post and Courier

William Reeves Elementary School first graders Colby Manning (left) and Steve Simpkins speed-stack big cups as they participate in the 2011 Stack Up Thursday. The school was participating in the “Most People Sport Stacking at Multiple Locations in One Day” Guinness world record attempt.

SUMMERVILLE -- Six-year-old Sarah Jones was ready for Thursday's challenge at Reeves Elementary School.

As one of about 350 students at the school participating in the World Sport Stacking Association's 2011 Stack Up, she knows how to build a cup tower and take it back down with lightning speed.

"I practice at my house because my brother has them," she said. "His are orange for Clemson."

The students were part of an attempt to break the Guinness world record for "Most People Sport Stacking at Multiple Locations in One Day."

Last year, 316,736 stackers participated. Thursday's goal, the sixth year of the event, was 350,000.

At Reeves, students competed against each other in several challenges, using mini, regular and jumbo cups and rotating through stations at three-minute intervals.

At some stops, they made "3-3" stacks -- that is, two three-cup pyramids -- and then disassembled them. At others they copied diagrams of larger stacks.

After each game, the slower student had to go to a "Stackspot" in the center of the room, choose one of several physical activities and complete 10 repetitions.

Physical education teacher Taryn Floyd said she has been doing cup stacking with her students for several years, and participated in Stack Up in 2007 and 2008.

Sport stacking is easy to learn but challenging to master, according to Bob Fox, WSSA founder. Benefits include improved reaction time, hand-eye coordination, concentration and focus, he said.

Other schools that participated included Charleston Southern University, Fort Dorchester Elementary, Pye Elementary, Oakbrook Elementary, Oakbrook Middle, Oakland Elementary, Spann Elementary and Windsor Hill Arts Infused Elementary.