This talk was given at a local TEDx event, produced independently of the TED Conferences. What can baby robots tell us about ourselves? Mysteries of human cognition, like the mechanisms of curiosity or the origins of languages, are starting to be unveiled through experiments with robots that can learn by themselves. Pierre-Yves Oudeyer, research director and laureate of the prestigious European Research Council (ERC) program, introduces the Poppy open-source 3D printed humanoid robot made at Inria, allowing every lab, school or FabLab to join this open science exploration.