I'm another curious mom wondering how unschooling works. Here's my main question...left to his own devices, my 4 year old son would watch TV all day long, so I'd like to know from the unschoolers: what restrictions do you establish to prevent a child from getting in a rut of all-day TV, or even playing alone with one toy for hours on end, which my son would also do, but isn't always healthy.
Would he really watch TV all day long if you asked him if he'd like to go to the playground, have a friend over, or go to the zoo? Sometimes kids need to be told what their options are and otherwise they will just watch TV as a default. Part of unschooling/homeschooling is making opportunities available for your child. And young kids don't even know what the possibilities are so they can't ask.
I never restricted TV or the computer but I'd invite my son to do things with me to be sure playing with the computer was a true choice (he never was very into TV.) I spend time looking for opportunities that would interest him, meet other homeschoolers at the park for weekly parkdays, etc. We talk about having a healthy lifestyle and balance. We take family walks regularly to make sure we are getting a minimum of exercise. Unschooling doesn't mean you don't make suggestions and give guidance.