Introduce chess at 6 months old?
Tell his parents about your ideas.
I agree. Tell his parents about the idea. It's there choice. But in my opinion, if he liked looking at the chess board, then I guess let him look at you play some more, and maybe he will be interested in playing when he grows older.
According to a commercial, the child is attracted to the tires--he must want to be a mechanic. You can address this to his parents, assuming he has any, but don't take a interest in the checkered board as an interest in chess.