The Green Show is a really fun little outdoor theater right outside the Shakespeare Festival. It's free and really fun. There are usually several different shows, so try to go a couple times a week. Sometimes they're set up in a more Elizabethan style, and other times more modern. Usually they correspond to the play that's showing that same night in the main theater. Try to arrive early though because the seats are just on a little grass hill, so it fills up fast, plus bring a blanket to sit on. A lot of people come early and bring a picnic dinner, and if you want a good seat that's the best way to do it.