Action Philosophers, by Zeus!
Action Philosophers is a comic book series by Fred Van Lente and Ryan Dunlavey. From what I can see in the previews, it’s irreverent but true to history. Might be a great way to get the foot in the door as far as philosophy is concerned. There are previews on the website, including one on Augustine.
Btw, there is an answer to the Greek kid’s question (click to enlarge).