ConceptofCausalityMotorSkillsInflectionsPruningCognitionObjectConceptPlasticityBabblingWindow ofOpportunityEnriched Environ-mentMonotoneLittleScientistsVocabularyNeuronReduplica-tion BabblingSynapseSensori-motorCortisolSensory StimulationStimuliPassiveVocabularyCooingSeparateSelfDepthPerception