Shapes can make things strong — Design, 4–6 years
A shape is not only something we name or draw. Its edges, curves and support points can help an object stand, carry weight or fit with another object.
Shape has a job
Changing a shape can change what an object can do. A flat sheet bends easily, while a folded or rolled sheet can become stronger. Designers choose shapes not only for beauty, but also for standing, holding, covering or joining.
Why do shapes matter?
People needed shelters, containers and bridges that would not fall apart. They discovered that some shapes spread weight and others tip or bend more easily. This is why a designer studies how parts meet and where the object touches the ground.
A taller block tower
A tower of six blocks keeps falling. First, put the widest block at the bottom. Next, place each block near the middle, so its weight stays over the support below. If the top leans, move it back before adding another block. The new tower stands because its weight is balanced.
More blocks do not always help
When a tower falls, it feels sensible to add more blocks at the bottom or make it heavier. But extra weight can push the tower over, especially if the base is narrow. Look first at the support and balance, not just at the number of pieces.
Shapes in buildings and tools
A chair has legs and a seat arranged to support a person. A roof slopes so rain can run off, and a bridge uses strong shapes to carry people or cars. At home, you can spot these choices in shelves, boxes, tables and playground equipment.
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