My baby girl 2 year 7 months old. We joined her in play school. While leaving her in school, she goes inside without showing bye to us. She doesn't cry like other children. While coming back to pick her, she does not show any reaction. She comes quietly. I'm worried that, is she aware that parents are leaving her alone in school,? Does she know that? But she can understand whatever we talk and tell her. How to make her aware? Also she goes, If anyone calls her and lifts her.