– You wonder how they get all the colours, don't you?
– Sorry?
– In fireworks. All the colours. Especially compared to the ones we had when I was a child, when I'm sure things looked less exciting than the big displays you get nowadays.
– Chemicals. It's just the chemicals they add to the firework. Metals burn with a characteristic colour, as you will remember from school chemistry lessons.
– I'm not sure I do. I don't think we were allowed anywhere too close to a Bunsen flame for health and safety reasons.
– I suppose chemistry laboratories are dangerous places. But even so, explosions and pungent smells are part of the attraction of science. Without them, what chance of encouraging students to become the chemists of the future?
– And I was never that keen about dissecting frogs.
– I am sure the frog was not wild about it either.
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