Also those Dyson bladeless fans are false advertising. They are just hidden in the base and channel air. Instead of a large quiet blade it instead has to use a high RPM (noisy) fan to push the air through the small exhaust vents.
This is a horrible gift idea. With the small vents I would imagine they would get clogged often as well. Just think of what builds up on a normal fan blade or in your computer case in a thin vent.
As for noise. Think of computer case cooling. Would you want a 120mm CPU cooler at 2,000RPM or a 60mm CPU cooler at 10,000RPM.