I think that weather whether you are a child or an adult, you will have both happiness and sadness. As for a child, he/she might fight with other kids just because he wants to share other toys but he is denied. As for an adult, nobody cares about their emotion all the time which is very different from a child who can easily attract their parents' attention. Compared to children, the word "easy" won't always appear in an adult's dictionary. on the other side, adults won't easily get angry with little things. Adulthood is the symbol of experiencing many tough times, hardships, or bad things, which can help us understand the world and life better and can help us make correct goals too. But we might have many regrets for the past too. A child usually has many chances to correct the direction of their future until they get to be succeeded.