“In a study, preschoolers who used screen less had better language skills.” Screen time is associated with the degree of myelination of the nerve cells and thus affects the signaling efficiency of the neurons.The message of the study good parenting is important in those early years being there, interacting, talking, playing, singing, reading, asking and answering questions basically human experiences.
https://www.nytimes.com/2019/11/04/well/family/screen-use-tied-to-childrens-brain-development.html?fallback=false&recId=760287965&locked=0&geoContinent=AS&geoRegion=LAN&recAlloc=control&geoCountry=PH&blockId=discovery-automated&imp_id=634816189&action=click&module=Science%20%20Technology&pgtype=Homepage