lol...
if you want it to be as easy as possible you can get an "all in one" motherboard....that means it has video, sound, ethernet, usb etc built in....less stuff to mess with for a build.
Case/power supply
floppy drive
All in one motherboard (Biostar M7VIZ is perfect for this)
CPU/heatsink (athlon 2500 barton perhaps)
Ram PC2700 DDR
hard drive (retail box comes with cables)
CDRW or DVD drive or both
Modem if you need one
Keyboard/mouse
monitor
OS (Win XP Home--90$)
I like
www.newegg.com for motherboards and cpu's
I like staples or office max or office depot for hard drives and monitors and cdrw/dvd drives...cuz I dig rebates....get a nice 120g drive for maybe, I dunno, 65-80$ after rebate and a good 17" crt monitor for maybe $55-70)
OS from
http://www.saveateagle.com/ or
http://www.eastoutlet.com/ or
http://www.eastoutlet.com/
cases from newegg or maybe
www.electroseller.com or local comp shows