There are huge archives of flash animations and you can install a safe “emulator” for playing flash that even runs in your browser. Look up Ruffle. I can’t remember the name of the big archive site I used, but it didn’t take much googling. I know I was able to find Homestar, Larry Carlson, Adam Phillips (bitey), joe cartoon and salad fingers as well as a ton of games from back in the day.
Only reserve IPs that are outside of the DHCP range you’ve configured.