Am I pushing too hard?

I remember growing up a family had a "Can't Can" It was literally a can that you had to put a quarter into every time you said I can't. And it was magic and the can gave the parents 75 cents when the kids went to sleep for the parents to pass on to the kids the next day for any significant "Tri's" Like 3 quarters (tri) for a try at something new or hard. It really worked. Something about the immediate punishment (plus getting up and walking away to the can to put money in) but the delayed gratification in recieving the award was a magic combination. It definately cut down on the "I can'ts"