Thoughts Can Create Fear
Since with silly fears, by definition, there is nothing to fear, what kids are really afraid of is the story they are telling themselves inside their heads. They are afraid of their own thoughts.
Given that music can be so effective as a teaching tool, many therapists prescribe a song or two along with the following procedure to help kids learn that they can master their thoughts and fears. Free at the link below, the song Go Away Bad Thoughts is custom-designed for this challenge.