In this Design and Technology unit, the children explored how structures can be made strong, stiff and stable. They investigated different types of chairs and tested a range of materials to discover which were most suitable for supporting weight. The children learnt how shape, size and material choice affect the strength of a structure. Using their findings, they designed a chair for Baby Bear, considering how it would meet the design criteria. They then constructed their chairs using appropriate materials and joining techniques. Finally, the children tested and evaluated their finished products, identifying strengths and suggesting improvements for future designs.