In the UK we are just past Bonfire Night, Fireworks Night or Guy Fawkes Night. I love the Britishness (or is it Englishness?) of this festival, especially the fact that over most of the year we (as a country) obsessively track explosive materials – and yet in the weeks leading up to bonfire night we openly sell explosives to anyone! I love the NPL firework display and I love the anarchy of people letting off fireworks in their own gardens. And I love observing my children enjoy the responsibility being allowed to light fireworks themselves. And I just love the colours and the brightness and the patterns – all created by practical chemistry. It is just like having my eyes tickled.