Vector art is a form of digital illustration that uses mathematical paths or equations to create shapes, which allows for scalability without sacrificing image quality. Unlike raster images, which are composed of pixels and can become blurry when enlarged, vector art maintains crisp lines and vibrant colors at any size. This makes it particularly popular in children's book illustrations, where characters and scenes can be resized for different formats and designs. Artists utilize software like Adobe Illustrator to create intricate designs that can be easily manipulated.