Children at this age are growing to understand rules of games. They ask the "why" questions. The can use pretend play to make friends and they know what is good, bad, naughty, allowed, etc. They also begin to understand what is right and what is wrong. Boys may dress up as policemen and girls may dress up as nurses. This is the children understanding that know what roles men and women play in society. Children get excited by Christmas, halloween, Easter and birthday parties.