What does "kindful" even mean?

The short answer is: yes I made it up.  It's a way I've found of explaining mindfulness to my boys.  "Mindfulness" is such an abstract concept for a lot of kids.  For some adults too.  But the way I see it if you are kind to yourself, kind to others, and kind to the earth you have captured the essence of mindfulness.  And being kind is something that I think everyone can relate to and appreciate.