The Force Awakens is still a few months away, but already Star Wars fans have fallen in love with one of the film's supporting characters: BB-8. The rolling droid is a spiritual successor to R2-D2 and now, thanks to Sphero, you can buy your own miniaturised version. It connects to iOS and Android devices and, using the companion app, you can switch it between three different behavioural modes: Driving, Holographic Messaging and Patrol. But where can you buy this little curiosity on "Force Friday?" We've got you covered.