It is broken up into 30 minute shifts because for every person that volunteers for a 30 minute shift we get a point for the HOCO event! However, if you stay after 30 minutes that is for your hours towards APO and not the event. So if you stay there 4:00-5:30 you get 1.5 national service credits and we get 1 point! SO SIGN UP! If you stay there the whole time you get 4 hours.