It is not necessary to invent something extraordinary that your child laughed. Children laugh not only for joy, but also from pleasant communication, pleasure from a game or... just from life. Sometimes they at first begin to laugh, and then look for the corresponding occasion - to explain to people around the unexpected fun.
In a human body there is a special hormone which is responsible for laughter. It is endorphin. The feature of a children's organism is that it is capable to produce hormone endorphin in bigger quantity, than the adult. And still... Some parents are disturbed by a question - why the child does not laugh. Especially it is relevant when the kid had no severe spiritual wounds, was brought up in ordinary family. And where then infectious children's laughter? Where it was gone? Why it it is not heard? Children's laughter is an obvious signal for parents that the child feels well. When such signal does not arrive, parental nervousness is about it quite explainable. It is normal reaction of adults. Unfortunately, the concern is not vain. Endorphin has other widespread name - hormone of "wellbeing". Its shortcoming can strongly affect mental health of the kid. It is the anyway best of all to consult with the children's psychologist. Why the child does not laugh? Excessive control over behavior of your fumes and own behavior can be one of the main reasons. The child extremely sensitively reacts to state of mind of parents. He quickly adopts "decent" behavior and begins to control the feelings also excessively. At the same time he extremely seldom expresses them aloud. Sometimes it happens that the kid "too will cheer up". However he is straightened out at once, calling for "order", that it looks too silly. Subsequently the child begins to constrain independently the emotions, showing excessive self-checking - not to seem silly and ridiculous in the opinion of parents. Sometimes happens that thoughts of the child do not correspond to current situation. The fact that it seems to another ridiculous can seem to the emotional kid sad and even deplorable. For example, when children, for the sake of an entertainment, will bring in a class of an unfortunate kitten - all will have fun, and your child will be feels sorry for him. If adults are avaricious on manifestation of parental feelings, then it is hardly worth expecting from the child of other reaction. Even children about one year can be gloomy, unsmiling and released from the world around. In such cases the parents should think: whether is enough for the child of their attention whether all of them create conditions in order that the kid was joyful and cheerful.