3D printing is one of those technologies full of promise which has yet to prove that ubiquitous adoption is worthwhile. [Sound familiar?] The promise is that we will be able to download patterns for useful things and print them at home, saving the costs of mass production and distribution and, at the same time, enabling customisation for each user. One has the impression that most of the things produced so far have a toy-like quality but in the following item we see the green shoots of the promise becoming reality. Normal game controllers are too difficult for people with weak muscles to use and purpose-built light-touch ones are expensive, then along comes 3D printing and someone with the vision to use it to produce low cost controllers for people with muscle impairments. Building custom game controllers for the disabled (3ders.org) Hat tip to Nicholas Robinson.