4D printing

prof_braino

http://www.youtube.com/watch?v=w98IWWugcVw

2 part 3D print has static and water absorbing parts. Just add water, and it "builds" itself!

http://www.designnews.com/author.asp?section_id=1392&doc_id=260118&cid=NL_Newsletters+-+DN+Daily

Martin_H

I really thought this was going to be about that klein bottle you keep seeing people print.

Here's a video of someone trying to fill the 3D shadow of a klein bottle.

http://vimeo.com/20390916