I miss lego mindstorms - that was the best toy I ever had!
I'm guessing by the position of the light centre it follows a line and the touch sensor can tell it to turn around if it hits a wall.
Man I'm tempted to go looking in the loft for mine just looking at that
You might be best to go look in the loft. you will have plenty time on your hands soon
 
	 
	 
  
 
		 
 
		
 
	 
 
		 
	 
	 
	 
	 
 
		
 
	 
	 
	 
	 
 
		 
	 
	 
 
		 
	 
 
		 
	 
	 
	 
	 
 
		 
	 
	 
	
 
	 
 
		