At 4+ months, babies drooled a lot as they begin to teeth.  In Chinese, there is a tradition to “collect their saliva” so they would not drool as much.  When Ethan turned 4 months, grandma had the “saliva” ceremony at KHS.  According to the tradition, one would take the donut like cookie that was hanged around Ethan neck and gentle swipe it on his chin.   Then, the person will break the cookie from the necklace and eat it.