Ancient mac tard here. I've got a pile of them I've gradually been refurbishing but it's time consuming so they're mostly just sitting for now.
The 68k era macs from between 1988-1995 are a fun rabbithole if you haven't played with them before since there's great emulation support and the emulated hardware can easily scale up to levels the real hardware couldn't (system 7 circa 1990 will happily push a 1080p display at 256 colors or a 4K one in monochrome) and aside from dialog box positioning most everything handles the obscenely high resolutions well. Sims that use the standard mac UI kit (SimCity/Theme Park/etc) are fun like that. There's also good support for reading/writing their filesystems via free tools and it's fun to just make a multi-gig disk, dump thousands of apps onto it and have it just work.
If you've got an amiga or any old computer that reads floppies it's worth the time to build a Greaseweasle since you can image and write floppies at the flux level. It might seem a bit intimidating but it doesn't require soldering, just a breadboard, $5 microcontroller, FDD and a couple wires. Works like a champ for cloning disks with weird copyprotection or creating Amiga media on a PC.
Tools and USB interface for accessing a floppy drive at the raw flux level - GitHub - keirf/Greaseweazle: Tools and USB interface for accessing a floppy drive at the raw flux level
github.com