A structure for interaction by a user comprising: a body (1620,1625) having a cavity therein; a first sensor connected with the body and configured to sense a unique identifier of a trackable device (1005,1010,1015,1300) associated with the user; a display connected with the body; and a processor connected with the first sensor and the display, the processor configured to receive first information from a server based on the unique identifier sensed by the first sensor, cause the display to display the first information, receive input from the user, and transmit second information to the server based on the input received wherein the structure for interaction is further configured to: display a link user interface element on the display; in response to the user interacting with the link user interface element, establish a link between the trackable device associated with the user and another trackable device by scanning information associated with the other trackable device; display a blacklist user interface element on the display enabling the user to setup permission restrictions for the other trackable device; and in response to the user interacting with the blacklist user interface element, to setup the permission restrictions for the other trackable device. a body (1620,1625) having a cavity therein; a first sensor connected with the body and configured to sense a unique identifier of a trackable device (1005,1010,1015,1300) associated with the user; a display connected with the body; and a processor connected with the first sensor and the display, the processor configured to receive first information from a server based on the unique identifier sensed by the first sensor, cause the display to display the first information, receive input from the user, and transmit second information to the server based on the input received receive first information from a server based on the unique identifier sensed by the first sensor, cause the display to display the first information, receive input from the user, and transmit second information to the server based on the input received wherein the structure for interaction is further configured to: display a link user interface element on the display; in response to the user interacting with the link user interface element, establish a link between the trackable device associated with the user and another trackable device by scanning information associated with the other trackable device; display a blacklist user interface element on the display enabling the user to setup permission restrictions for the other trackable device; and in response to the user interacting with the blacklist user interface element, to setup the permission restrictions for the other trackable device. display a link user interface element on the display; in response to the user interacting with the link user interface element, establish a link between the trackable device associated with the user and another trackable device by scanning information associated with the other trackable device; display a blacklist user interface element on the display enabling the user to setup permission restrictions for the other trackable device; and in response to the user interacting with the blacklist user interface element, to setup the permission restrictions for the other trackable device.