Teach your pets they can trust you. Take care of them. Treat them with tenderness. Teach them how to behave. (Unless it's a cat. You can't teach cats anything.)
You can get into big trouble (with school and the law) even by fake / joke threats of violence (bomb threat, etc.)
No jokes or pranks that have anything to do with violence.
Read books. Any kind. All kinds. It’s exercise for the brain and it feeds the soul. Start slow, that’s ok. As with many things, consistency beats speed.
When the child is feeling upset or out of control, that is not the time to teach a lesson. Share your calm, be a safe place for them. When they’re feeling better, THEN teach the lesson.
Write your own job description. When you've been around long enough to know what you're good at and can identify what needs in the company you can help with.