The illustration features two whimsical characters, known as Thing 1 and Thing 2, seated back-to-back. They have large, expressive eyes and exaggerated, flowing hair, adding to their playful and endearing appearance. Both characters are dressed in red shirts with white text that reads "THING 1" and "THING 2," respectively, emphasizing their unique identities. The overall design is simple yet vibrant, with a clear focus on the characters' distinct features and their quirky personalities.