the students demonstrate with a gesture how they would normally do it. He emphasizes the word "grasp" during the exercise because children hold a toothbrush with all fingers pressed against their palms and explained that there are toothbrushes on the market for toddlers that have short, thick handles that can be grasped easily.
周卓明的問題一來，學生的手不自覺地比起刷牙的動作，他特別強調「抓」這個字，因為仔細觀察，小朋友都是用整隻手掌「握」牙刷，現在市面上已經出現把柄短粗，專給小朋友使用的牙刷。