Reddit mentions of Picquic Multique Compact Multi-bit Screwdriver (colors may vary)

I'm not 100% sure what you mean by driver, is that's a drill-specific thing, but my go to screwdriver is a piquic multique. I get them for $7 at microcenter and have them scattered around the house and in every bag I have. I love these little guys.

http://www.picquic.com/index.html

http://smile.amazon.com/Picquic-Multique-Compact-Multi-bit-Screwdriver/dp/B001O0QDBK/ref=sr_1_1?ie=UTF8&qid=1449990237&sr=8-1&keywords=multique

Ah, he'll just want to pick up a bitpac to go along with the one I linked then.

http://www.amazon.com/Picquic-Pozi-drive-Screw-Bitpac-Bits/dp/B00AFVYCGC/ref=sr_1_2?s=hi&ie=UTF8&qid=1421686365&sr=1-2&keywords=bitpac

And as a random note, don't accidentally get the lower end model! If it doesn't say "super 8" (referring to 7 bits plus the central shaft which comes apart) then the shaft is locked in place making it a bit less useful.

Here is a standard 7 part by comparison: http://www.amazon.com/Picquic-Multique-Compact-Multi-bit-Screwdriver/dp/B001O0QDBK