This is a Holoprojector mount system that can be used with servos to control the movement. It uses two micro servos like the tower pro SG92R (or similar in size) and it has standoffs for an arduino trinket. This way you can configure it to move by itself either randomly or other means.
This works best with this HP: http://shpws.me/LBGV but it can also work with aluminum HPs that have a ball diameter of 2.44" or less.
You will need 4-40 screws and nuts to secure. 3/8" length should be enough.
Note: this only contains 2 pieces the front and back holders for the HP, no servos or screws are included.