Any remedy to clear phelgm for a 16m toddler?

My grandfather used to make us ginger tea and made us all drink if we were coming down with a cough. Ginger stimulates the saliva production that helps to thin the mucus secretions. Here's how you do it: - Crush a small piece of fresh gingerand add to a cup of boiling water - Allow to steep for few minutes and then strain the tea - Give this to kid 2 – 3 times a day when it is still warm