[A school-age hijabi is typically] banned from riding a bike, swimming or participating in other activities that characterize a healthy childhood. She is taught, directly or indirectly, from an early age that she is a sexual object, and it is her responsibility to hide her features from the opposite sex, lest she attract them. A heavy burden for modesty is placed squarely on her shoulders. So many women have been traumatized by such an upbringing, which, I believe, frankly borders on child abuse.
Various European schools have already banned the child-hijab, and more are doing it all the time.