Start with watching Lilo and Stitch with them. I cannot think of a better way to start. 

If you want a short version, a minute [here](https://www.youtube.com/watch?v=-U0xGBNl2fE) and [here](https://www.youtube.com/watch?v=Gx0LA2tPXvU) will help explain.  

I often think that there is something really poignant in this, anyone else?

