Filling your own bucket.
There is a great book that elementary educators often use called Have You Filled a Bucket Today by Carol McCloud to teach kids about the power of bucket filling and bucket dipping. When you do something nice or helpful or considerate for someone else, that is filling their bucket. And when you do something inconsiderate or hurtful to someone, that is being a bucket dipper.
This is an overly simplistic look at this concept, but it works for Kindergarten students, and I really believe that everything we need to know we learned in Kindergarten, so I will go with it.