A Kewpie doll is a small, chubby figure with a distinctive round head and a tuft of hair, often depicted with a playful expression. Originating from the early 20th century, these dolls were created by Rose O'Neill, an American illustrator, and became popular for their cute and whimsical design. Kewpie dolls are typically made from materials like porcelain or plastic and are often dressed in simple clothing. They have become collectibles over the years, with various styles and sizes available, appealing to both children and adult collectors alike.