Let's say one uses a UDOO Quad, Dual or a Neo in a school environment. Apart from the powered UDOO board there is no other power source. Can these boards be damaged by wrong wiring? Like from the +5v to input port, from the +5v to the +3.3v power source, etc etc. Apart from making mistakes kids are eager to experiment 'what happens if'', which is a great way to learn, but not if you have to bear the costs of replacement.