Lesson 1: Playground design challenge

Before starting this unit, check that the children can recall:

• Stable structures do not topple over easily.

• Structures with wide bases are more stable than those with narrow bases.

• Placing weight near the bottom of a structure helps it to be more stable.

• Strong materials can be helpful when building structures.

• Shell structures are hollow and have a thin outer layer.

• Frame structures are made from connected rigid parts.