Why are Mr. Wonka's square sweets unusual from the book charlie and the chocolate factory?

Mr. Wonka's square sweets are unusual because they defy the typical round shape of most candies, showcasing his whimsical and creative approach to candy-making. These sweets are designed to fit perfectly in the corners of one's mouth, adding to their uniqueness and appeal. This innovation reflects Wonka's eccentric personality and his desire to create a magical experience for those who enjoy his confections.