Old Comedy, as it was written by Aristophanes around 420 B.C., was generally heavy on obscenities and vulgar jokes but shrouded in references to news, gossip and literature of the day, which makes it even more arduous to translate and perform. KC's Gorilla Theatre tackles one of these ancient works each year and performs it on the south steps of the Nelson-Atkins Museum of Art (4525 Oak) a little after sunrise, complete with costumes, choreographed movements and original live music. Today and tomorrow, the company takes on Aristophanes' The Knights, a satirical look at social and political life in Athens. Parental guidance is suggested. The performances go from 7:30 to 9 a.m. today and Sunday. Search "Gorilla Theatre" on Facebook.