Lets face it, my Earth changing invention is pretty awesome. It can change anything into anything, I've used it to build a business empire and I've got my own 'north pole'. While I haven't been able to use this device to avoid NORAD or end world hunger (yet), I still think that this festive period I should use it to do some good.
Naturally I've contacted the big man beforehand, and Santa is onboard with my plan to bring some festive cheer this holiday season.
My device can change any form of matter or energy into presents, and can be used for unlimited delta-v manoeuvres. It can also be assumed that my Massive Intellect can create any number of robotic factories (Mecha-Elves) or airborne delivery drones (Reindeer-Drones) with which to deliver said presents. The presents can be made anywhere, and the drones can be deployed at any time.
My question is this:
Is it possible to deliver a single undisclosed present weighing roughly 1 kg to 80% of the population of the Earth without causing mass panic or having my earth changing invention discovered??
Please note: The present doesn't have to be placed directly under the tree, but you get bonus points if you can manage it. My Device must be able to completely enclose material to be transmuted within a set of emitters (like a 3d printer) but the emitters themselves can be mobile, and my device is capable of transmuting a kg of matter from one form to another as fast as required, but with a hum that becomes louder the more rapidly the matter is to be transmuted (1 minute/kg is silent, 1 seconds/kg is like a large washing machine, 1ms/kg is similar to a light jet engine).
You may also assume that Santa has informed me to which children (large or small) coal should be delivered.