Yes, true...it is GNU/Linux.
But in the end I think it is more important that I spent my little one a PC
with a free GNU/Linux OS on it for playing her favorite MP3 files rather than
a Windows 7 box, right ?
I think for a standard vanilla Trisquel 5.5 2GB of RAM are mandatory. The
system I used is an old Shuttle SN41 barebone system with NForce2 chipset and
an AMD Athlon 2800XP+ inside. This mainboard is pretty picky about RAM. I am
happy that I had 2x512MB of DDR RAM which runs stable in dual channel mode
inside this box.
For lower end desktop environment (e.g. XFCE, LXDE, OpenStep) 1 GB will be
fine though.
