Robots start flat, then pop into shape and crawl
Self-folding machines use heated hinges to transform
![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2014/08/mr_felton1HR_feat_free.jpg?fit=860%2C460&ssl=1)
TRANSFORMER A flat robot about the size of an iPad mini and made mostly of paper and plastic can fold itself into a crawling machine.
Seth Kroll/Wyss Institute