There is provided a control system of an attraction, the control system comprising a controller (60) configured to: receive optical data indicative of motions of a plurality of users (52) and motions of a plurality of objects (54) in the attraction; identify a first motion of a user (52A) of the plurality of users (52) based on the optical data; identify a second motion of an object (54A) of the plurality of objects (54) based on the optical data; detect a correlation between the first motion of the user (52A) and the second motion of the object (54A); and determine the object (54A) is associated with the user (52A) based on the correlation.