The Effect of Medical Clown on the Pain and Anxiety Perception During LRH Analog Treatment or GH Provocation Test

The investigators would like to examine the contribution of medical clowns in routine medical procedures in the endocrine clinic. This will be the first time that will objective evaluate the effect of medical clown on stress hormone such as adrenaline cortisol and prolactin, and also evaluate the effect of mental stress on growth hormone secretion in children. The aim of the current study is testing the pain and anxiety of the patient and the accompanying parent and medical staff in the presence or absence of medical clown at the time: 1. LRH analog (decapeptyl) intramuscular injections for precocious puberty. 2. Growth hormone tests. Secondary end point will be: 1. Changes in stress hormones: cortisol , prolactin and adrenalin during growth hormone tests in the presence of a clown. 2. Does the presence of a medical clown and the mental stress affect the secretion of growth hormone? 3. Are there differences in growth hormone secretion and stress hormones between the various tests for growth hormone secretion (glucagon, clonidine or arginine) in the presence of a clown? 4. Are there differences in response to stress and the secretion of growth hormone in children with obesity?