This paper presents an interface for enabling a sUAV robot (Daedalus) to communicate and simulate emotional states. As significance is the result of the interpretation of emotional states, an experimental study was performed to evaluate and recognize emotion-state responses from people when interacting with the sUAV. Four expressions were programmed combining Daedalus' interaction features such as head movement and eye color display. During the assessment, subjects were asked to recognize the significance of the expressions performed by the robot and assign an emotional state of the robot through card selection. Our research aims to investigate the impact of simulating emotional states in robots, and its potential during interaction. Results presented are part of an experimental study for setting future exploratory research concerning human-robot interaction.