The Missing Piece Meets The Big O by Shel Silverstein
This is one of the most profound musings on self and love that I have ever come across. The drawings are simple and spare, but with those tiny tweaks of expression that are so effective. Children easily grasp the concept of needing to do something for yourself, and how the willingness to try something can lead to growth and change. For more mature readers, it is a quiet tract on how wholeness comes from within.