This is the best story/lesson/sharing time I have found that teaches kindness, acceptance of differences, and self-love. It is entertaining and silly enough to keep children's attention and tender enough to teach a lesson.
This is the "Welcome to Primary" teacher packet I give to each teacher called into my ward's Primary. Feel free to edit it and make it your own or just use it as a launching board for the culture you want to create in your primary.
Because of this small pocket of freedom in a patriarchal church, primary has become a sanctuary for me, a sacred, loud, bubbling place where age and biological sex are just pieces of who we are and not yet used as incriminating evidence to divide us from each other.