Parents ought be a bit careful with theater: theater directors tend to coerce even young kids into joining one production after another. It can become a year round grind.
And a bind: who gets the best roles? The kids who can be counted on for every production, all through the year? Or, the kids whose parents prissily cite Aristotle's "Everything in moderation," and who can only be counted on sometimes?
Maybe, if a secondary role causes child upset, such can become opportunity to examine true principles and standards; to examine what is really important. Things seem so easy from the perspective of this keyboard and monitor! So clean. Unmuddled.