I have a Blueberry iMac G3 I'd like to deploy as a kids computer in a library environment. It will not have Internet access. All the educational games I'm finding require OS X. Recommendations welcome...

Linux, possibly Ubuntu

Easy Way to Install Ubuntu on iMac G3 - Ubuntu Forums

Thanks. Edubuntu was going to be plan B but I hadn't researched what it would take to do it.

It's not as easy as that link makes it out to be. I posted for help in the Ubuntu Apple Users Forum. Any X jockeys reading this should rush there immediately and brashly point out my configuration failings.