[X4U] DVDs on legacy PowerBooks?

[Mark Des Cotes]

Anyone know what's the oldest (legacy) PowerBook that can play a DVD? 
I'd like to get an older inexpensive PowerBook just for word 
processing. But I'd be willing to pay a bit more than I had anticipated 
if it can play DVDs (I've got two kids and we like to take long road 
trips). I've been looking at portable DVD players but if I can kill two 
birds with one stone...