Hello Mr.Bhusan...Hope you are doing good...if your son/daughter is not understanding the study of engineering then plzz don't force him to do that...if he is not interested on that anymore then let him choose his career option by himself...let him choose the field on which he is interested...otherwise it may affect on his future...students should always choose the path they want to go...plzz understand your son/daughter as a responsible parent...because this is the time when the root will going to be strong...so make sure on which field your son/daughter is gonna be happy,let them choose that path...that is my reccomendation...Hope your son/daughter's future will be great...Best wishes from me.