The hei tiki looks like a distorted human figure sitting cross-legged, its large head tilted to one side. Hei tiki were usually worn by women, except in very rare cases. There are instances where previously infertile women have given birth after receiving a hei tiki. Full article on Maori ...
Also interesting to note however that tiki are sometimes called heitiki and in some other Polynesian cultures hei or hea is a god of wisdom. Many sorcerers leant the art of shape shifting and would turn into birds or fish to escape danger or sneak up on Spellsongs and Charms In former ...