At School? I do it with the grandchildren…..along with a few much more dangerous experiments KMnO4 with a couple of additives is good, as as FeO2 + AlDid you ever do the custard powder in a tin experiment in science at school?
Fun fact ( but in these PC times some twinkle won’t like it, I don’t care, deal with it)I love the use of screwits, not seen them for a long time.
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