Got hypersensitive kids who hate having their hair washed? Try one of these.
It's a foam-rubber ring that sits on top of the head, pulled down to forehead level where it acts like a balcony to stop water running down their face. It takes the anxiety out of shampoo time (and it's fun, like being in the rain without getting wet).
They're not expensive and you can find them on ebay and some pharmacies (just Google ‘shampoo hat’).