Can you describe how to cure cough in children?

Depends on Cause. Otc cough suppressants for children contain mainly dextromethorphan, a mild cough suppressant. Some studies show honey to be equally/more effective for soothing cough (never give to children <1yo). If caused is posterior nasal drip, consider use of antihistamine. If due to inflammation (wheezing) in lungs, child may benefit from bronchodilator tx (albuterol) and/or steroid therapy.