The average house wash-basin and facet was design for adults. Little hands often have difficulty to wash by themselves. The solution? Have an empty shampoo or body-wash bottle, cut the sides out and slot it to the sprout.
Let your little ones wash by themselves, and remind them to scrub and use the soap. Just remember, keep an EYE on them, 9/10 children with access to water, will find some fun in making a wet mess, somehow.
Image from: http://goo.gl/L0e3Nb