Decreasing Reading Levels

I'm reading "Ricki Ricotta and the Mighty Robot" at the 3rd or 4th grade level. For some reason, my reading level keeps decreasing. I feel like Mork in "Mork and Mindy" who hailed from a planet where people are born old and grow young. I'm not growing younger on the outside or shrinking. Maybe my brain is decreasing in size. I hope smaller brain = greater imagination.