Start stocking up on your doses of comedy caffeine to prepare for the 2nd Playground Improv Marathon. Improv troupe K.C. Redheart is preparing 30 continuous comic hours of improv to benefit the Namaste Charter School and The Playground Theater. Each hour consists of a new show featuring guests from companies like The Second City, iO, Comedy Sportz and more. Get in on the improv insanity from 5 p.m. Friday, Aug. 26, through to 11 p.m. Saturday, Aug. 27, at The Playground Theater, 3209 N. Halsted St. Ticket prices vary with $5 for matinee hours, $10 for prime time hours, or $25 passes for the entire marathon. For more information on the 2nd Playground Improv Marathon, call 773-871-3793 or visit www.The-Playground.com. Photo courtesy of K.C. Redheart and Guy F. Wicke