Hope the teacher and the school administration is aware with previous rainbow incidents. If not, that is a type of carelessness/bad safety culture. By just maintaining few feet distance between the students and the demo could have prevented this incident (may be common sense). Adding more fuel (ethanol/methanol) on a hot surface is the cause of the incident (my guess).
Very preliminary information, but look at the quote by the five-year old witness: http://abc13.com/news/12-children-injured-by-blast-during-experiment/1999709/
"Fire was changing colors and the last one wasn't working, so we put it a little bit more, and then it exploded," said Kate Earnest, a 5-year-old who was part of the group that participated in the experiment. "That's how the other kids got burned, and they were crying."
From the school's web site, http://www.mdpc.org/ministries/children/the-yellow-school/ "The Yellow School is an early childhood program for children 3 years old through kindergarten." My god. What utter stupidity and ignorance.
Another news reports says it was the school science teacher. Who, one presumes, somehow thought this was age-appropriate despite the long and public track record of what happens with this demo over and over again. Obviously this is not a target audience that any of us could probably have ever reached with our best efforts and national campaigns, and how this person could find information on how to perform the demo with also encountering the multiple reports of injuries and danger is beyond me: https://www.google.com/#q=rainbow+demonstration and https://www.google.com/#q=rainbow+methanol No wait, of course - go to YouTube and this is what you get: https://www.youtube.com/results?search_query=rainbow+flame
I hope the Houston prosecutor doesn't give this teacher a free pass. He or she should be criminally prosecuted for wanton endangerment which is, apparently, in most jurisdictions defined as "conduct which creates a substantial danger of death or serious physical injury to another person." It's time to stop calling these injuries "accidents"
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