Michael Darby has been supported by ModMyPi for his latest project – an Iron Man mask with an in-built heads-up display and it’s all driven from a Raspberry Pi Zero. He’s taken the Pi, a LiPo battery, an Enviro pHat and some optical equipment and built it into a kids’ Iron Man mask. He’s called it (obviously) Pi-ron Man and documented the whole thing over on his blog, 314Reactor.
The result is pretty darned good for a play-hack and the idea of a heads-up display is one I’d love to do myself!