In this instructable I am going to show you how to make a Rubik's cube that houses a speaker and is fully functional. It is compatible with all wireless Bluetooth devices or can be used with a 3.5 mm audio jack. The integrated battery can be loaded via USB as shown in the second picture.
As you can see in the pictures the plugs are well hidden, so it is a great way to prank your friends, by making the cube talk to them.
Here is a video of the cube. I'm sorry, that the sound is so hard to hear. I can't wait to get my new camera.