Well, this is a side project. Using the same B-robot electronic Brain SHIELD and two servos you can remotely control (via Smartphone´s WIFI) a laser pointer and play with it from far away (maximum range up to 50-60 meters). It is portable if you use a small 7-9 volts battery (Lipo/Alkaline/…).
Drive your neighbour´s cat crazy from a distance by placing the robot on the roof!.
More info here!