This is actually a thing I had my mind changed almost immediately upon hearing argument for primary and early secondary schools.
Children need facial expressions to read the emotions of teachers/peers and are important part of their development. So forcing them to wear mask impede that part of development. Now its up to you to decide whats more important.
Just to support the point. There are videos of mother interacting with a very toddler everything normal, then she is told to hold steady and neural face all the time. The baby quickly notices and becomes increasingly distressed.
Children need facial expressions to read the emotions of teachers/peers and are important part of their development. So forcing them to wear mask impede that part of development. Now its up to you to decide whats more important.
Just to support the point. There are videos of mother interacting with a very toddler everything normal, then she is told to hold steady and neural face all the time. The baby quickly notices and becomes increasingly distressed.