Great idea. Actually testing a product is even better than surveying with any age group. Don`t be intimidated that there are too many kids in the world for you to handle. If the product is good enough (and you will soon know by testing it), then you can patent it and sell it to a larger corporation (if you choose to do so).
I talked to a guy from Proctor & Gamble who said the Crest SpinBrush they sell was purchased from the guy who invented the spinning lollipop you always see in the checkout line. He took the same concept and adapted it to a new market and it did wonderfully. (I think he called it `Dr. Dan`s Spin Brush` or something.)
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