Quantum Cubelet (think cubelet): When you attach a quantum cubelet to an action cubelet, the quantum cubelet will choose a random fixed state from a quantum fluctuation, using a knob cubelet, or other various input cubelets (sensor and think cubelets can be both inputs), you can cause the quantum cubelet to change it’s state to a new random state. The quantum cubelet should be able to change how it behaves in response to input, for example, the orientation of the quantum cubelet attached to the other cubelet could mean that it changes it’s output value when the input stays the same, or the orientation could mean the opposite, that the output value changes when the input changes within the detectable range of sensor.
My idea obviously need a lot of refining but it really is a start.

not sure if the tech could be scaled down enough to fit in a cube though, heres a website that is constantly outputting random fluctuations
http://150.203.48.55/RainBin.php