Can be placed and used as a distraction. When placed, it will make loud train noises, attracting robots from far around. When held in hand, if you right click, it will change to "moving" mode, where when placed, it will start moving forwards (about the same speed as a walking player) and make loud train noises, causing robots to follow it making a very good distraction.
A typical application is to lead robots away from a fragment using a Toy Train set to 'moving' mode. Be sure that you are close enough to crouch-walk to the fragment safely.