They will be assigned a unique 5 digit identifier: The first digit is for the camp session; the next two digits are for their cabin number; and the last two digits are for their subject ID (identification). Subject 30804 would be in camp session 3, assigned to cabin 8, and subject 4. All subjects enrolled will be assigned a subject ID which progressively increases across all camp sessions, i.e. during the summer there will be only one subject #4.