Look at this nice clay sculpture by Ben Hollis and Eva Funderburgh who chose an unusual material to house their Arduino in. The porcelain gives off a soft glow in staggered rhythms provided by the super bright LEDs underneath the nodules.
Arduino is used more and more by arts and design projects to implement some physical computing applications. It’s easy and intuitive way of programming microcontrollers is a welcomed opportunity for non programmers to model some physical enabled applications. You can light some multicolor LEDs, read out sensor values of all kinds and control all sorts of actuators, such as stepper motors, brushless motors, linear motors and many more.
See Ben Hollis’ site for full documentation.