Is it ok that I let my five year old son beat me at chess

Ok, guys. Thanks for all the feedback! For me, I'm actually just glad that he's learned all the moves and he knows how to castle. I'm not expecting him to play too seriously yet but just to get a feel for the game. I have done, as some people suggested, played mating patterns with KQ vs K, that's pretty good and although I have to remind him sometimes what move to make, he can see the idea of checkmate.

He's very protective of his pieces and even if loses a pawn when he has a major advantage he gets upset about it. Bearing in mind all kids are different. He seems to get pretty upset by losing. Still, I know he has to learn that because the first time he plays a real kid and he gets demolished it might crush him. 

I also like what one poster said about winning some and losing some to keep his interest. I will start to win a few games later on just to show him how it feels. 

The other thing I have to get him to see right now is how to attack, because he mostly just moves his pieces around on the board with no objective. Of course, he's only five. That's way young and I don't think even Carlson played with any real skill at that age. But again, I'm not on some mission to turn him into the next Carlson either. Just trying to give my son some skills that might be useful for making friends and broadening his horizons in the future. 

I'll try and see if I can get the book mentioned. I have a book called simple checkmates which has a bunch of mate in one or two positions. Maybe I can set those up on the board for him and ask him to mate. Starting with the one move mates and when he's a bit older move onto two move mates. 

Thanks again for all the help. 

For attacking, the simple endgame checkmates teach the lesson that the pieces must work together. That should help with his regular game if you constantly reinforce that idea.

You should mix it up. Sometimes allow him to win. Show him easy mate problems. Show him also easy tactics like pin and fork.If you only show him mate problems, his thinking process will be limited to finding mate. Show him tactics that win materials. In this way, he will have more idea on what to do and look for. Once you show him some tactics, ask him to solve tactics problems.

World's Champion Guide to Chess by Polgar is perfect for him as this book contains puzzles appropriate for him. Teach him also basic endgame mate of two rooks against a lone king. Rook and king mate against a lone king.

Show him that rooks are good in open file. Bishops are good in open diagonal and that he should be using/bringing out all his pieces.

Install also a chess playing app on your tablet/mobile. Let him play level 1. If he is consistent at beating level 1, set up level 2. If there are kids arround you that he can play, let him play them. If he lose to these kids, tell him it is okay as these defeats will make him better.

It could lead him to believe that he can win just like that. When I was a little girl, about 4, my dad taught me chess. I loved the game. I couldn’t ever beat him. He played full strength, because he taught me basic mates. Queen mate, two rook mate, and rook mate. I stopped playing then started again at 12. I am 15 now, and I am a competitive chess player, and honestly I still haven’t managed to get over that with players way above my level, I seem to think they’ll go easy cuz im a 300

The first time I beat my father at chess I finished up wearing the board on my head and all the pieces in my lap.

There are ways to let them win without letting them win.

Let them turn the board around when they see checkmate.
Play pawn wars with more pawns for the child.

Start without your queen (this will not be enough until they learn to make equal exchanges).

That was his uncle's excuse and he's sticking to it.