Abstract: Water is the major constitute of the body tissue, and total body water in the individuals ranges from 45 to 75% of Total Body Weight. Dehydration in children usually results from loosing large amount of fluid and not drinks enough water to replace loss. Oral Rehydration Solution (ORS) can be used to prevent dehydration and in many cases is quite literally a life saver. Oral rehydration therapy not only prevents death and dehydration.