|Created by a freelance paper engineer and designer in the UK called Geoff Rayner, this paper and card construction kit involves no glue at all! Watch the video to see the model that Tim made, using this kit. Tim reckons it took him about 10 hours to construct the Walking Machine. As someone who studied mechanical engineering in his past, he found many aspects of the design fascinating. But be aware - this is a seriously challenging kit to make!