Ball Demo. A great way to try before you buy. We will be having a ball demo on Sunday November 17th at Poplar Creek Bowl. There will be a squad from 1:00-2:30 pm and 2:30-4:00 pm. 20 % off all Storm and Roto Grip balls.Our next ball demo will be on Tuesday November 19th at Elk Grove Bowl from 7:00-9:00 pm.20% off all Storm and Roto Grip balls.