I have seen several board games and of course the
permaculture playing cards (that I desperately want but have no spare money to get right now) that relate to permaculture and could make great games to play with children to get them learning about it. Having designed games, I expect it would be possible to design a lot of different games based on permaculture ideas. They could even potentially have market value if the artistry and design was of quality. Off the top of my head, the game of
Wildcraft comes to mind. It is made to be played with children (has child friendly artwork) and teaches about how wild plants can be used to help both with their edibility and their medicinal natures in a fun manner. I am sure I will think of a few more with a little time.