Mac OS 8.6 Easter Egg - Secrets in the Apple Menu

While on the Desktop, hold down Option and select About the Finder... from the Apple Menu.
This displays the About the Finder screen.
While on the desktop, hold down Option and Command to display that same screen, but make the cursor a Smiley Face.
In case you're wondering, the background is Claris'(Moof's) back. In older versions, it would show black and white mountains, then zoom out to show Claris.
While on the Desktop, hold down Control, Option, and Command to show the About the Mac OS Team screen.
This shows a full-screen show of the credits for the OS and has little icons and animations at the top.