I love all the bright colors and I think he will also love it. My anal side says to alternate the 9 patch so you have a white corners then a colored corner then a white corner, etc. I love the idea made by quilting candy about putting them on a diagonal. Might be very interesting..... If so, I would probably use the striped blocks with the stripes going in the same direction. But, there are always many different ways to go and we would make ourselves crazy playing with them all. He is just going to love how bright and colorful it is and later he will treasure that you made it for him.