Why did they switch characters in lazy town?

In "LazyTown," the character of Stephanie was originally played by actress Julianna Rose Mauriello for the first two seasons. She was replaced by Chloe Lang starting in season three due to a combination of factors, including the desire for a new direction for the character and the natural aging of the young actress. The change aimed to keep the show fresh and appealing to its young audience while maintaining the essence of the character.