A seven-year-old schoolboy Joshua attends his school lesson via a robot avatar, placed in his classroom, in Berlin, Germany January 13, 2022. Joshua Martinangeli, 7, is too ill to go to school. But the German student can still interact with his teacher and classmates through an avatar robot that sits in class in his place and sends a blinking signal when he has something to say. REUTERS/Hannibal Hanschke

A seven-year-old schoolboy Joshua attends his school lesson via a robot avatar, placed in his classroom, in Berlin, Germany January 13, 2022. The project is a private initiative paid for by the local council in the Berlin district Marzahn-Hellersdorf. REUTERS/Hannibal Hanschke

A seven-year-old schoolboy Joshua sitting beside his brother Martin attends a school lesson from home via a robot avatar, which has been placed in his classroom, in Berlin, Germany, January 13, 2022. Joshua cannot attend classes because he wears a tube in his neck due to a severe lung disease, said his mother, Simone Martinangeli. REUTERS/Hannibal Hanschke

Classmates say hello to the seven-year-old schoolboy Joshua via his robot avatar before a school lesson at his class in Berlin, Germany, January 13, 2022. REUTERS/Hannibal Hanschke

A seven-year-old schoolboy Joshua attends a school lesson, sitting beside his mother Simone and his brother Martin, via a robot avatar in his classroom, in Berlin, Germany, January 13, 2022. REUTERS/Hannibal Hanschke