g3 imac laying around

hey folks, I've got a g3 imac that's been in my garage since a relative of mine passed in the 90s. He was some kind of theoretical physicist. Should I give this thing a go? Is there any particular guide to hardware from this era? Stuff like bad caps, leaking batteries etc? I'm guessing this thing probably has some kind of MacOS 9 on it. I'm out of town until next week but if I get any good tips I'll try them out when I get home. Thanks!