This is the beautiful moment the police helicopter made a little boy's day.Callum McKinney, aged four, is seen raising his toy police helicopter over his head while a real police helicopter hovers above the ground just a few metres away.The hovering 'copter, about to embark on it's latest mission on Bank Holiday Monday, even gives the little lad a blast of its 'blues and twos' siren."He was over the moon," said the lad's father.The touching moment was captured on his father Greg's mobile phone