The titans of industry use 3D printing to prototype products and devices of all kinds in an effort to save costs and build items beyond the capabilities of standard manufacturing techniques. There is also an active community of brilliant and inventive makers who use 3D printing for the same reasons. There are a variety of commonly available materials which, when combined with exceptional ideas and 3D printing, result in items that can take on everything from problems around the home to designs for flying machines of all stripes. This pressure sensitive touch switch from Swiss designer Gareth at Let's Make Robots was built with cheap conductive foam and he was kind enough to share it on Thingiverse should anyone need one for their project. Read more about the device and the full story here:

Below is a photo of the conductive foam in action: