Body Troopers Norwegian Jakten p nyresteinen , also known as Chasing the Kidneystone, is a 1996 Norwegian Childrens film directed by Vibeke Idse, starring Torbjrn T. Jensen and Kjersti Holmen. Eightyearold Simon shrinks himself to microscopic size in order to travel through his ailing grandfathers body in search of a kidney stone. On his journey he meets anthropomorphic characters such as the taste buds, white and red blood cells, and the vocal cords.
Source: Wikipedia