R. L. Stine’s The Haunting Hour: 1x11

Fear Never Knocks

Fears become real when the grandchildren of a decorated psychiatrist play around with an ancient recorder in their grandfather’s office. It turns out the recorder was brought to their grandfather by Fear itself. Now what can they do when Fear wants it back? One of the children tricks Fear into going into the box by saying she is afraid of Fear itself and it disappears forever.