The reason why there were no cars in Frozen and Sleeping Spell was probably to show the power of nature and the importance of the ecological environment. In these two movies, a large number of scenes took place in forests, lakes, mountains and other natural environments. In these environments, cars were not a common mode of transportation but a symbol. In addition, many characters in the movie used horses, mules, and other animals as transportation, which also reflected the importance and respect for nature.