Imagine a house that you can put into a backpack. Two students from TU Delft have developed amazing foldable structures at Harvard. They made 3D material in Prof. Katia Bertoldi’s lab of a controllable form and size. Their results were published in ‘Nature Communications’ (11 March 2016). Bas Overvelde worked there as a PhD candidate and Twan de Jong as a graduate. They furnished the rigid surfaces with flexible folds made of air pockets and thin tubes. This enabled the entire structure (the size of a coffee table) to be controlled pneumatically. On the YouTube film, it looks more like a piece of art, and that is really what it is.