Arduino with Scalextric and Conducttr
This video shows a demo we created for Learn Do Share in London. The concept is the "driver" of the car tweets his journey to work. The public interact with him on Twitter and for every tweet received the car makes a lap around the track.
All the social media interaction is taken care of in the Conducttr project and the Ardunio then polls Conducttr to get the number of tweets and drives a servo motor connected to the Scalextric controller.