It took us a long time to think about the water only aproach with her also. It was on a long hair forum that someone brought up only using water, it was for adults, but I thought, hey that would probably work for kids. I tried it too, but only made it 4 months and then it just didn't work so well. We only use water on my soon to be 5 yr old too. But she is not hair challenged. She has gorgeous mid back thicker hair. And you know it works so well for her hair. If something gets in it, it almost always just brushes out. We use a salt oil scrub in the shower and it does end up in her hair, and her hair never looks greasy or smells. I am not sure how long this will last, I am thinking puberty might mess it up, but she gets so many compliments on her hair. I love to tell people that nothing but water, well, food, paint and other junk, touches her hair. Usually they are touching her hair and then they pull their hands back thinking that her hair must be dirty.
Hopefully they stop putting their hands in strangers hair