I would highly recommend the FAIR(not BFAIR) manuals for ANY age. I have used them for ages 4-14. There is so much you can do using them as a springboard and modify for almost any age. I have found that even teenage boys love the terrific classic picture books and cannot resist sneaking in and listening when I read them outloud!! The manuals are not, strictly speaking, necessary. But they are so affordable, why not?? They are the best deal for curricula out there, IMHO. You can even find them used on ebay, etc. The FAIR forums are also a great source of ideas.
And to address the question of skills...well the only thing it does not teach very well is math. Again, IMHO, you could use only FIAR and Saxon for 1-3 grade and your kids would be wonderfully educated.(Well and some sort of phonics/reading program. But Starfall.com would more than adequate for that) I highly encourage the use of the free lapbook ideas on HSS. And let your imagination run wild and explore what ever themes catch you and the kid's interest for each book. You can really go hog wild. For example, when we rowed The Story of Ping we learned about ducks, different kinds of boats, China (flag,map, culture, customs, money, etc) we made handmade paper, made our own Chinese food, went to a Chinese restaurant, studied other Chinese animals, Chinese calligraphy, read some other books that take place in China and because it was the year of the Olympics in Beijing, we watched the Olympics, studied the history of the Olympics, learned about new-to-us sports like curling and more!! As you might have guessed, we often row for more than a week. But you don't HAVE to do a huge deal like that if you don't want, it is designed to be simple and short. I just love the idea of following a learning thread and exploring it out.