To find out how, watch BBC4 from 8pm to 9 pm tonight, tomorrow night and the next night (29, 30 and 31 December)
www.rigb.org/christmas-lectures/sparks-will-fly
That is the title of this year's series of Royal Institution Christmas lectures - how everyday objects can be adapted to do extraordinary things. They are aimed at schoolchildren (lots of dramatic experiments to watch and some dreadful jokes) but are suitable for adults too.
Tonight's is called "The light bulb".
Tomorrow's is ""Making contact" - how paintball guns can be controlled with a webcam and a smartphone transformed into a microscope.
Wednesday's is "A new revolution" revealing how robotic and motor-driven appliances work.
More fun than a soap. Dads and grandads will also enjoy watching the presenter - Professor Danielle George. Not all engineers are blokes with slide rules in their pockets and bald heads under their hard hats.
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