This is the forum for posting your oldest, still-working PowerPC-based Mac! It's OK if it has a couple minor issues (dead FireWire or USB ports, non-working CD drive, e.t.c), just as long as it boots!
This is mine:
iBook G3 (Dual-USB, Late 2001)
This is mine:

iBook G3 (Dual-USB, Late 2001)