Maybe a discussion about why we do theatre? An ensemble has to work together to tell the story in the best way possible. Sometimes we have to set aside our own needs (and egos) for the sake of the show. (I'm pretty sure I read that somewhere on this board, but I don't recall who to credit). If they love theatre and want to be part of it, they have to accept whatever role they've been given and do their best.I love what you said about theatre being a safe place...maybe share a story from your own experience about theatre provides that for you?
I'm also all for theatre games to help build community. We also sometimes do compliment circles during tech week. I put all the names of the cast and crew in a big cup, and each person draws a name and gives that person a compliment about something related to the show. It can be a compliment on a performance, or something about how they helped out backstage, or found a lost prop, or that they are always friendly to everyone. My kids LOVE doing this.Show them your love of theatre and commitment to doing it well, and that will go a long way. Best of luck to you!