Building is one way that young children begin to make sense of the world around them. It helps them understand the qualities of different materials and how these materials can be joined together to create something new. Children enjoy making and creating their own buildings and structures from the resources and materials they find around them. This process provides opportunities for the development of physical control, logical reasoning, decision-making and problem solving. First constructions can be quite simple, such as stacking blocks to build towers and watching them fall when knocked over. With experience, constructions can become more complex and may involve group work, such as creating cubbies and shelters using household objects and recycled materials.