Blocking your face can make your baby laugh. Is there a little secret of what’s psychology behind this?

Although there are regional, linguistic and cultural differences, However, the way to tease the baby is very similar everywhere. Ding Ma is sure that every mother with the baby has tried this method: block her face with her hand in front of the baby, then quickly remove it, and match it with an exaggerated expression or interesting voice, so that the baby can giggle. It has been tried and tested repeatedly.