In this paper an Augmented Reality system for teaching key developmental abilities for individuals with ASD is described. The system has been designed as an augmented mirror where users can see themselves in a mirror world augmented with virtual objects. Regarding the content the tool is designed with the aim of facilitating the acquisition of certain skills in children with ASD. From a technical point of view, it has been necessary to solve two problems to develop the tool. The first one has been how to capture the user’s movements, without wearing invasive devices, to animate their virtual avatar. A Kinect device has been chosen. The other problem has been to mix in the augmented virtual scene real objects located at different depths. An OSG shader has been developed, of which details will given in this paper.