Oh, this is going to be a steep learning curve!
I downloaded a 240 page manual from the Wiki this afternoon (before I saw your post telling me to look at the control panel).
Well, I cannot find the control panel. According to the manual, it should be a drop down from the home (control panel, restart, shutdown, register). From the laptop I have, the drop down says (reboot, shutdown, register, and about this XO). when I click on about this XO, it says:
Build: update 1.708
My daughter is only 5, and we did manage to figure out the memorize activity, but that's about all. I did notice differences between the laptop we have and the manual. One other thing that was odd -- the box arrived from amazon and the laptop box inside the large box did not have an intact OLPC seal -- the seal was broken but retaped. The laptop appears to be brand new, and all of the packaging material appeared to be intact. fwiw.
Do you know if I can get instructions for the various activities from the Wiki? They're not in the manual.