The Niedermeyer Bike Message CycleLight [Babel] attaches to your pedal poppy and lets you send a range of 9 messages to the world. Stuff like ‘follow me’, ‘I love you’ and ‘be careful’. Why you should want to say these things to random passers-by as you zip past is not fully explained, but I’m sure that it’s worth the 15.90 euros in any event.