We love our oyster cards in London. They are electronic ticketing RFID cards that make travelling around London so simple — just tap in and tap out on the tubes, buses, trams and even boats down The Thames! No more fumbling around for change to buy a ticket ever again, yay! But we're a bunch of makers and hackers here at sugru, we like to tinker with things. So the other day, Jude from team sugru (you'll probably know him as on Instructables), came in with a big grin on his face. This usually means one thing, he's been making something cool!