3D printing is awesome and it started at the Metalab Vienna (to become affordable resp DIY) as far as I know but what about 4D? http://www.ted.com/talks/skylar_tibbits_the_emergence_of_4d_printing.html I'd love to read your comments! Here are some impressive examples of 3D I've duckduckgoed (googled) for recently. Please feel free to link to other examples! ☞ 3D printer creating ORGAN tissues: http://dfw.cbslocal.com/2014/02/06/3-d-printer-creates-organ-tissue/ ☞ 3D printing candy http://candyfab.org ☞ 3D printing chocolate https://chocedge.com/3dprinting.php ☞ 3D printing metals (using laser sintering as a difference to Fused Deposition Modeling FDM used in RepRap, Makerbot and other DIY 3D printers. Filament is most often the bioplastic *) PLA (Polylactid with properties like Polyethylen high-density HDPE or the thermoplast ABS (Acrylonitrile Butadiene Styrene which is based on petroleum (*bad bad bad*))) http://www.engineering.com/3DPrinting/3DPrintingArticles/ArticleID/6903/Mits... ☞ 3D printing mud & seed (I <3 this Grass Art) http://makezine.com/2014/01/23/mud-seed-become-3d-printed-grass-art/ ☞ 3D printed houses (watch this TEDx talk showing a 3D printer which builds a house in 20 hours:) http://www.youtube.com/watch?v=ehnzfGP6sq4 ☞ Please feel free to comment with links to other examples! *) great source for bio-based materials: http://www.bio-based.eu/ibib/ Thank you in advance for your answer(s)! Best regards, Benjamin