The Construction programme develops children's ability to plan; to articulate what they have planned; to analyse the structure of objects (e.g. buildings, bridges, fences etc); and to analyse the relationships between their different parts. To do this they learn to use an important mental tool. This is a scheme (a drawn plan or a structure) which acts as a visual model of a structure that the children will build for themselves using a set of modular building blocks. Through the use of a range of schemes in a variety of tasks, children learn to look at objects from different perspectives and to think carefully about what they need to do to build a given structure before they start building.