my son has completed his 5 yrs. this que is reg his behaviour. when he is studying in lkg he was very active and when he saw me in school he use to be normal but when he entered ukg i have seen many changes at starting when he sees me in school he use to cry to come home after that he asked me not to come to school to attend for any function. before I go to school he was very active but when he sees me he used to change his facial expressions becomes dull and not actively participating in activities. is there any problem in his mental status or it is normal pls suggest rite solution