At what point does that source, crayons, run out? I don't know about you, but it's been 10 years since I bought crayons for kids and grand kids. I give them itune gift cards so they can buy alps for their iPads. In five to ten years, crayons will be history like kodak film.
I admire the product for cleaning up a problem but not sure I see a mass purchase of the product.
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