My own daughter has thick long hair. Even at four years old she would rarely sit still for long enough for me to give it a really good brush through.
Luckily, Tony from Modern Gent suggested we use the Tangle Teezer and for once a product has more than lived up to its hype.
My daughter will use it herself and gets good results on wet or dry hair. She even now lets me brush her hair properly as the total time spent brushing it is greatly reduced when using the Tangle Teezer.