Odwrócona góra albo film pod strasznym tytułem 2000 on netflix

An adaptation of the book by Jerzy Niemczuk. The protagonists are strange but friendly creatures inhabiting the heart of the forest – Tatun, Mamuna, their child Sonek and grandfather Lesavik. The grandfather’s inventions – including a kite, a znikolina and a conusola – save the children trapped in the mighty Marbat castle.