The project consists in developing a ‘Wizard of Oz’-type tool that will allow the child to find himself in a bubble of confidence, in visual and sound immersion in order to reduce his stress and release his speech. After a few minutes of exploring this somewhat unusual, playful and calm world, the child comes into contact with an animal and starts an interview with it. This discussion is conducted in real time with a health staff who will guide the child through the Calliope method in order to help him/her release his/her word to express his/her suffering.