Not as silly as it looks. When I was a cop I used to carry small toys to reassure children who were lost, or to win the parents over.
And hopefully to overcome the effects of foolish parents who told their children "I'll get a policeman on you" (So now the children won't go to to the police if lost).
Probably a lucky charm for Harry. He is a front line combat soldier.
Who now feels doomed? :-)
qjs