OLPC = One Laptop Per Child
OPPA = One Palmtop Per Adult
A palmtop is another name for a laptop computer so small it fits in the palm of your hand, a smartphone in other words, but perhaps with the cell feature turned off.
OLPC pioneered making laptops so inexpensive that even children, among the least privileged in our societies, might get one, not just their teachers and the administrators.
What OPPA means in 2015 is a $15 Coolpad, an Andoid, that one may use to play music, take pictures, and use free Wifi from any hotspot, no need to sign up for any plan.
Put it in airplane mode to make the battery last longer and then turn on the Wifi only. This isn't your phone. It's your palmtop.
If you're careful, you don't even need to let Google know this phone has been switched on, though you'll be asked many times if you wish to create a Google account (you may already have one, and still choose to keep this phone more anonymous).
I recommend paying more and getting an SD card for it, adding gigs of storage. More room for more music, like Philip Glass and Pink Floyd.
STEM Lesson Plan
Kirby on YouTube (2009)