Hi! I still think that Little Hearts for His Glory would be perfect for your girls. The target range really is K to 1, it will be just right, I think. You would need a complete phonics program for the K, and age-appropriate math for each girl. You could choose the Grade 1 science text and use it for both. You would use the Rod and Staff workbooks with the K, and the Thinking Skills for the 1st grader (see Fine Motor Skills). You would use handwriting books at their respective levels. They would use the same History and Storytime books. They would both use the devotions book and the Bible memory CD. You might consider adding just the Beyond Little Hearts manual so you can have the emerging reader's schedule and hands-on activities for Singapore Math 1A and 1B, which would mean you would only need the workbooks for that, and it wouldn't be a waste because you would use the whole manual the following year when they are in grades 1 and 2. By then you could add Drawn into the Heart of Reading 2/3 for your older girl, and the Bigger Hearts Manual for hands-on math activities for Singapore 2A and 2B, and use the emerging readers for the younger one. (Once you get to Singapore 3A and 3B and up, there is a schedule for using the texts and workbooks in the higher level HOD manuals-Carrie isn't writing hands-on beyond Level 2B, so you would then need both the texts and workbooks).
Sorry-I'm big on thinking ahead
Just wanted to add, that even though a child is an advanced reader, doesn't always make them ready to do intense work-I made that mistake with my oldest, who started reading on his own at 3 and a half-I thought he was automatically ready to do full-blown school-boy was I wrong! I wish I had HOD at the time, because he would have still learned what he needed to know, and still enjoyed being a little boy, without me overwhelming him with things he wasn't ready for-thankfully, after a year of that, I backed off and found a much gentler program (almost as good as HOD, but not quite

)
That's my $.02

I'm sure you will make a good decision-choosing is hard, but once you get your hands on this program, it'll be smooth sailing
