Child’s Farm Hand Wash Grapefruit (250ml). Hand washing is the most effective way to combat the spread of coughs, colds and viruses, as well as preventing thread worms in children. Proper hand washing with everyday products can leave hands feeling dry.. Our handwash contains naturally derived Glycerin to leave hands feeling hydrated and prevent them from drying out, making it the perfect solution for dry, sensitive and even skin that may be prone to eczema.