You don't have to be a "young one" to answer this question!
The Society prides itself on the thousands of JW youth who open "a large door leading to activity" during the holidays and summer vacation. We are led to believe that the youth have few interests of their own and spend the majority of their free time away from school (or college!) knocking on doors.
In the February Kingdom Ministry young ones are suggested to go out on field service straight after school and during the evening to take advantage of the extra daylight hours.
If you are a current or former JW youth how did you spend your free time?
I'll start the ball rolling.
I didn't go out in service for most of my teen years, let along Saturdays. I would hang out with my friends. During my late teen years, an elder studied with me and encouraged me to go out more which I did to a point, but I lost interest.