The third ability is related to social representation, in which the child is able to represent another individual's mental representations, such as desires, thoughts, and feelings. This ability appears when a child is about 5 years old. It enables the child to take the perspective of others and strengthens their understanding of others' thoughts and beliefs. By this age, children are aware of the subjectivity of pretense. The ability of perspective taking is also central in an individual's ability to cooperate and work with others. This is a complex representation skill because it requires the child to have a representation of a representation. The child also needs to keep in mind that the representation they are holding is not their own. When a child engages in role play, they are engaging in simulation in which they are putting themselves in the character's mental state.