Creating a vast and detailed fantasy world that encompassed my family's large farm and most of my grandparents farm. (They lived close.) When I started school, school figured into it as well. Good way of dealing with the boredom of living on a (relatively) isolated farm. Nearest kid my age was well out of walking or biking distance, so I had to entertain myself a lot.

Do you sometimes feel like you've wasted too much time?