About thirty years ago I opened a school to teach people windsurfing. You see, I LOVED to windsurf. My idea was to turn my passion for windsurfing into a summer business that would bring me some extra income.
I didn't expect that my windsurfing business would kill my interest in windsurfing. But that's exactly what happened. My hobby became my job, and I was soon hating it.
What I experienced is not a bit unusual. If you do what you do for pay, you probably will not enjoy your work. If you go to work because you love what you do, well, you'll probably love what you do.
I ran across an interesting article online that discusses an experiment that demonstrated that rewards don't work. Rewards actually are counter-productive. The experiment this article describes was done with preschool children who liked to draw. If children were given rewards for drawing, they began to draw less than other children who were not rewarded for drawing.
You can read that article here: Rewards.
Why do I mention this here on Mr. Kindergarten? To suggest that you avoid rewarding your child (or student, if you're a teacher) and trust the stronger and much more reliable motivator: intrinsic motivation.