Spatial navigation skills are very important in everyday activities and quality of life but spatial navigation abilities are not part of the standard process of assessment and rehabilitation of patients. Furthermore, it is known that children with cerebral palsy have impaired visuo-spatial competences. The main objective of this study is to evaluate and compare the spatial navigation abilities of typically developing children and of children with cerebral palsy using the StarMaze application delivered by means of a Head Mounted Display (HMD). The second aim is to investigate the user experience during the session. A similar application was already developed and tested in a virtual reality large scale platform whose size and cost limit the accessibility. Therefore, the assessment (and future training) of navigation abilities with affordable and easy-to-use technology such as HMD open new perspectives.