i try to get parents in any time i can, so i invite parents to these--and because our students are mixed for reading, both 6th grades are there. i have also invited our 1st grade reading buddies--but no more, the kids do get nervous.
one of my pet peeves is when people say they are doing reader's theater and they let the kids have elaborate costumes and complicated props and scenery. argh! plop their butts in a chair, have them READ, and make their expression do all the work. (okay, off my soapbox!)

i like to have my students read funny poems for reader's theater.