Cardboard is a sturdy material made from recycled paper pulp. It is commonly used for packaging and shipping items because it is lightweight yet strong. Cardboard comes in various thicknesses and types, such as corrugated cardboard, which has a wavy layer between two flat sheets, making it even more durable. In addition to packaging, cardboard is also popular for arts and crafts. People use it to create models, decorations, and even furniture. Its versatility and ease of use make it a favorite among both children and adults. Many schools incorporate cardboard into their art projects to encourage creativity.