We use the 106’s as well, but I photo copy most everything so that both of my older boys can use it. I have an almost 11yo and a 7yo, but we started this about a year ago and since you use some of it for your older one’s only then the the trouble of copying wasn’t a big deal. Plus, you don’t use the whole book so to copy the pages we needed was easy. We have a scanner which has made my life much easier when it comes to making copies…..highly recommend!
I may do something a little different with my youngest when the time comes (possibly do it with just him as my focus and let the others tag along, haven’t quite decided). I tried to have him tag along but it didn’t really work out that way, I even had a binder just for him so he could feel involved, but he may have still been too young.
This is one of my favorite ways to conquer science. I absolutely love it and I thank those who put it together. How I wish I had been homeschooled and was offered such a gentle and unique way to observe/learn/appreciate science and the One who spoke it in to existance……