Durable, thick pages characterize one format, typically printed on heavy cardboard or laminated paperboard. These are often smaller and more resistant to tearing, making them ideal for infants and toddlers. The other format utilizes a stiff cover, typically cardboard wrapped in cloth, paper, or other materials. These offer a wider range of sizes and page counts, accommodating longer narratives and more complex illustrations, suitable for a broader readership.
The contrasting characteristics offer distinct advantages for different age groups and purposes. Robust construction ensures longevity for frequently handled books intended for young children, while the classic format provides a protective cover for paper pages, preserving quality over time. The evolution of these formats reflects the changing needs of readers, from the durability required by early childhood to the more sophisticated presentation suitable for older audiences.