If you couldn't afford a new computer, someone offered you one for $50, even 4 years old, and you were terrified your kid twouldn't be able to compete with all the kids who's parents could affort computers, yeah, I think some serious interest is to be expected.
I'm using a 1999 Dell laptop to compose this message, by the way. Admittedly, a few minor mods here and there to keep it current. 7200 rpm 60GB hard drive, 512Mb memory, upgraded PII 300Mhz processor to PIII 800/650 speedstep, DVD +/- RW/CD-RW burner, wireless networking PCMCIA card.
I'm installing w98 on an old 1997 laptop I had laying around to give my neice to go to school. Put a network card on that sucker and its plenty fast to cruise the internet, do email, MS word, etc. I'm pretty amazed, actually, it's as fast as my 2.4 Ghz XP desktop for cruising the internet. You only need the latest and greatest high horsepower machines for gaming, not normal everyday stuff or schoolwork.
Randy