Is there a good or a proper age to play chess? When I first played chess I was terrible at it. I was like 5 or 6 years old back then. Now I understand the rules and stuff, but is there a specific or good age to play chess? An age when it's easy to understand?
Like learning to speak the appropiate age will vary from child to child.

I think 3 and older (My 10 year old brother taught me when I was 3). Children are naturally curious about any activity their parents/siblings do.  Just play chess in front of them and if they show interest show them how each of the pieces move.  At very young ages you will need to be extremely patient as some rules such as the knight movement and castling are quite difficult for young children to understand.