@geerlingguy Those eMacs will very likely need new caps... They were affected by the capacitor plague...
Otherwise they can run Leopard and (I think) Snow Leopard -- even if they're the slower G4 CPU variant, there's an OpenFirmware (Opt-Cmd-O-F) trick that tricks the installer into thinking it's an 867Mhz CPU rather than the 700 Mhz CPU.
Otherwise, they're great vintage machines if they don't have atrocious burn-in.
Hey, that is some nice plastic! How come the new-ish apple stuff didn't turn yellow? Looks very pretty from here, especially the mouse (mouses or mice?).
@Madagascar_Sky I'm guessing better material science as they matured—a lot of old tech in the beige era turns similar shades of ugly yellow!
The TiBooks were also notoriously poor-wearing over time.