Teegi is an anthropomorphic and tangible avatar exposing a users' brain activity in real time. It is connected to a device sensing the brain by means of electroencephalography (EEG). Teegi moves its hands and feet and closes its eyes along with the person being monitored. It also displays on its scalp the associated EEG signals, thanks to a semi-spherical display made of LEDs. Attendees can interact directly with Teegi -e.g. move its limbs -to discover by themselves the underlying brain processes. Teegi can be used for scientific outreach to introduce neurotechnologies in general and brain-computer interfaces (BCI) in particular.

Figure 1: We present simple modular bricks that support the easy creation and interfacing with physiological applications.

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Figure 1: An example scenario of DroneSAR. (A) A physical house mock-up. (B) A drone is mounted with two white paper panels. (C) The house is augmented using projection, and the main menu composed of a set of virtual tools projected on the drone panel. (D) A user selected the 'measuring tool' application using a controller. Then, the user positions the drone at the desired location in the 3D space (i.e., on top of the house) and draws a line shown in blue color on the augmented house to measure its width. Finally, the measured length is displayed on the drone panel.

The cerebral activity is an intangible physiological process difficult to apprehend, especially for children. With the aim of providing a new type of educational support, we studied the pedagogical potential of an interactive tangible interface (Teegi) designed to be used in educational context. This interface aims at enabling children to discover the relation between the brain activity and the human body functions. We propose in this study a methodology to evaluate its pedagogical potential in real context of use, considering the specificities of the children. This study, carried out with 29 pupils, highlights the strengths of this system, both in terms of its usability and its impact on learning. Moreover, the results provided by this methodology revealed possible improvements for a greater pedagogical effectiveness. This type of interactive interface, as well as the evaluation method proposed, paves the way for the pedagogical use of new interactive and tangible devices at school.