3d objects, origami and electronics

Can you get a 3d object out of a flat plastic surface?
Sure, no problem, simply follow some origami instructions and fold, fold, fold.

But: can a flat piece of plastic do it by itself?? :>
Take a look here:

• Plastic sheets perform auto-origami (and here)
  
• sony's
• For self-folding 3D electronics – just add water