Flying from the UK, will I be allowed to take a 3D Pen with me in the cabin? It is basically a hand held 3D printer head. The tip gets very hot when working but it is powered via USB, so you can get an idea of how much power it consumes.
My concern is that it may be classed as a tool, as mostly everything in that category is banned. I've checked what the UK has to say about tools in hand luggage but, as I more or less expected, there's nothing specific on a 3D pen.