McFarlane South Park Professor Chaos & Holding Cell Construction Set 39 Pcs 2017 South Park Professor Chaos & Holding Cell construction set by McFarlane Toys. This 39-piece building set features Butters' iconic alter-ego, Professor Chaos, complete with his silver helmet and cape, alongside a themed holding cell buildable environment. Part of the McFarlane South Park Small Construction Sets collection, this kit is compatible with other major building block brands. Perfect for collectors and fans of the Comedy Central series, this 2017 release captures the show's unique aesthetic in a detailed, buildable format. Recommended for ages 14 and up. #Unisex