RADical Days Presented by: Allegheny Regional Asset District This annual celebration of the organizations funded by RAD features free admissions and performances. Just a few of the participants include Classical QED 89.3's Byham Studio, the Carnegie Museums, Children's Museum, Mattress Factory, National Aviary, New Hazlett Theater, Pittsburgh Opera, RiverQuest and the Pittsburgh Zoo & PPG Aquarium. Date: 09/20/2012 -          10/13/2012 Time: various Location: various website