children should be seen and not heard
Children should not speak among adults unless they are addressed; children should be quiet and well-behaved. My grandmother was always shushing us because she was of the opinion that children should be seen and not heard.
children should be seen and not heard
Prov. Children should not speak in the presence of adults. (Often used as a way to rebuke a child who has spoken when he or she should not.) You may come out and meet the party guests if you'll remember that children should be seen and not heard.