Unless you can play games on it, students could care less.
I've built three of these fans now, playing with different heat sinks, prop sizes, etc. This one actually really cranks pretty good:
I've got a bigger prop that I've played with too that is much lighter, so light in fact, that they will melt if you don't give them a nudge to get going soon enough... good thing they come in a 3 pack. Anyway, the combination in the photo seems to work the best. Incidentally, the biggest heatsinks I have too. I have to put it pretty close to the center of the barrel and get it roaring pretty hot, but it does actually generate a breeze.
"Knowledge is power. Arm yourself."