I kind of wondered a bit how unschooling fits into that ideal. On one hand, young children are not emotionally capable of learning Torah for that amount of time. Also, play is extremely important for their development. Also, unschooling is a legitimate educational theory and therefore a child taking that route would be learning as is appropriate for his development.
I saw this quote today from the Zohar:
Zohar ( תיקוני זוהר תקונא עשרין וחד ועשרין דף ס עמוד א) says:
מצוה לאתעסקא באורייתא יומם ולילה הדא הוא דכתיב (יהושע א') והגית בו יומם ולילה וכי יכיל בר נש לאתעסקא באורייתא בכל יומי ולילי כל יומוי והא קודשא בריך הוא לית בא בטרוניא עם בריותיו אלא כל מאן דקרא קריאת שמע בכל יום ערב ובקר כאלו מקיים בו
והגית בו יומם ולילה
Translation: "It is a mitzvah to be involved in Torah day and night, as it is stated, 'you shall contemplate it day and night' (Yehoshua 1:8). But is it possible for a human being to be involved in Torah all night and all day! אין הקב"ה בא בטרוניא עם בריותיו (Ha'Kadosh Baruch Hu doesn't conduct himself despotically with His creations!) - Rather, [this means] that anyone who reads krias shema every day, evening and morning, it is as if he fulfilled, 'you shall contemplate it day and night.'"
Growing up, I had learned that option (for some reason I thought it was part of halachic literature, like the Shulchan Aruch or something; if you know please leave a source in the comments.) It is interesting that there is both an ideal of being involved in Torah day and night, and also a minimal Halachic way to fulfill this obligation.
