Roylco’s All About Lines Unruly Rulers make learning about lines in art fun and interactive. Each ruler features an animal that represents a different type of line—wavy, straight, jagged, round, and curved—perfect for young artists to explore and create. Ideal for drawing, painting, or tracing, these rulers are great for children of all ages. Plus, enhance your experience with our online instructional video and printable activity guides for extra creative inspiration.