Kraftwerk returned to live performance with the "Computer World" tour of 1981, where the band effectively packed up its entire Kling Klang studio and took it along on the road. They also made greater use of live visuals including back-projected slides and films synchronized with the music as the technology developed, the use of hand-held miniaturized instruments during the set (for example, during "Pocket Calculator"), and, perhaps most famously, the use of replica mannequins of themselves to perform on stage during the song "The Robots".