Take a work that either has no real clear Aesop or a decidedly Family-Unfriendly Aesop, and try to pretend it has a perfectly positive and wholesome moral. As in don't even mention anything unpleasant. The moral is to seem like something that even the most staunch of Moral Guardians would want to be told to children. If you can't find a work with no positive message, just choose a work and find some positive messages the creators probably didn't intend. But don't try to use this for stealth complaining. Compare Accidental Aesop. Contrast Warp That Aesop.