The main characteristics of black and white sleep cartoons are their simplicity and the ability to evoke a sense of tranquility. They might use light and shadow effects sparingly to add depth, and the themes could range from starry nights to cozy bedrooms.
A royal family cartoon show could feature things like their grand events, behind-the-scenes moments, or even fictional escapades. It might focus on showing their human side and relationships in a charming and colorful way.