It should be noted that the term "Kachina" is Actually a Hopi term.  Navajo's have the Yeibichai.
Many of these Kachinas are Navajo made as a kachina art form.

We are fortunate enough to have a Feature article sent to us by Jenny Smedley.
She is an Author in the UK that recently wrote a piece on kachinas and kokopelli after visiting Arizona.