This is an edited extract from an episode of BBC Radio 4's Material World, which you can hear in full on the BBC website.
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J5 series groupshot / Don / CC BY-NC-SA 2.0
Technology in Action as students try not to short circuit their robots














![Polling Station signage [Image: kagey b under CC-BY-NC-ND licence]](/openlearn/files/ole/ole_images/places/general-urban-scenes/polling-station-sign/polling station sign_0_0.jpg)



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