You can build a number of things using the huge Sandbox game Minecraft which includes a massive floating Macintosh computer. Flickr user Caius Durling made this floating replica in his Minecraft world. MINECRAFT SERVERS assembled it pixelbrick-by-pixelbrick and added a floating "Hi".
It's pretty impressive. The "resolution" on the Minecraft materials isn't good enough to display the Mac OS running on the device, but he got the dimensions correct, and he got the handle built into the back. All it requires is a one-button mouse, isn't it?