It chronicles a man's quest to get the color into soap bubbles. My favorite quote:
Once he tried nitric acid, a toxic chemical that gives off red fumes at room temperature. "I got it making a really cool bubble, but it could've killed somebody," he recalls. "It ate through clothes."
The coolest thing is in the last page of the article, though: they have come up with the opposite of a color-fast dye - it's a disappearing dye. Sufficient (but small) amounts of water, air, or friction cause the dye to become transparent - permanenetly. After talking about the bubbles, they list a number of possible applications that the inventors are looking into - not just for kids, but also for adults. I think kids will probably be the main target for products that include these dyes, though.