.....how about a radio control as used in a model plane/car etc. That way servo control is all taken care of and all that is needed is a bit of DIY to connect the servos to the targets, the only thing missing then would be making the targets come back up on their own, but using a radio system like that would mean most of the job was straight out of the box which is ideal for someone that doesnt have any electronics or programming knowledge. Just dont use the system near a model plane club