In order to start playing with his new nerf gun, I told X that he had to finish tracing his ABC book.
Without any reminder from me, he whipped out the book the next morning and started this. Unfortunately, he only lasted through C to F.
However, he knew that he had to complete this so he did not whine opening a new toy. Great system we had in place, it saved me so much headache when the kids knew what was expected of them!