After 3D printing comes 4D printing.

    From Bits:

    The 4-D structures are first generated by 3-D printers but then transform when activated.

    “This is a whole new idea of printing, where you don’t just print static objects; you print things that turn into other things,” explained Skylar Tibbits, an M.I.T. researcher who is working on the printer collaboration with Stratasys, an Israeli 3-D printing company.