Well here is my attempt, just 5 minutes in Photoshop. I just tried to bring out your son and his quad from the background. Could probably crop some of the foreground sand as well.
Others on here could probably do better but I think it's ok. Still think it's a great shot.
I don't think its over done. ! it does convey the kid's enthusiasm ! I like it! You could see it on his bedroom wall cant you ! (maybe crop 1/4 off the bottom?)
Moments of Light : D7K D610 18-200 150 12-24 24-70 70-200 + C&C very welcome! Being a photographer is a lot like being a Christian: Some people look at you funny but do not see the amazing beauty all around them - heartyfisher.