It would be awesome to see Ben build a VR headset similar to the Oculus rift, there is plenty of info on building VR headsets on the internet, but it would be awesome to see Ben's take on it. You could maybe use some high resolution LCD's taken from smartphones or something to act as the monitors. Alternatively, it would be cool to see Ben design a smart watch considering the massive hype surrounding them these days. I know there is already open source smart watch software called OS Watch (www.oswatch.org) and it can be run on something like the Microduino. You could you use a 3D printer to design a case for the watch as well. Anyway those are just a couple of ideas that I think would make awesome episodes.