The mental image we were brought up with of Santa's workshop was of hoards of elves working away making new stuff, painting wooden trains with paintpots and so on. But what if we were able to shift that image, and instead tell our children that the elves aren't making stuff, they're repairing it? That Santa's crack team, with their little screwdrivers and soldering irons, were breathing new life into tired laptops, mobile phones with cracked screens, and TVs with buttons missing? That new vision already exists, it's called a Restart Party. We caught up with Ugo Vallauri of London's Restart Project to find out more.