Some of my more 'entertaining' fears as a child:
- looking outside through windows when it was dark in case a monster would look back in at me
- running up the hall stairs at full speed always convinced something was chasing me right behind me
- pulling the plug out when I was lying in the bath because I was convinced it would trigger a whirpool which would somehow suck me down the plughole
I can logic it all out in my head now as an adult but I still remember the emotion of pure fear that consumes us as kids sometimes.