We started 106 Days last year, but didn’t finish it. We’ll be continuing it again this year. I like to use CGC along with 106 days. We follow the 106 Days lesson plans, but I read a small portion of the CGC teacher’s guide lesson and sometimes we add in an extra experiment or one of the upper level suggestions (my 12yo did a few of these).
The “not by chance” pages should be at the beginning of the CGC PDF notebook pages. These are downloaded from the Eagle’s Wings Ed website. Your 9yo should be able to do these and your 6yo could with some help (if she likes cut and paste projects). My DD was 6 last year and enjoyed them.
For the Outdoor Secrets, I was thinking of adding a lesson from here each week to go with our nature study. I just purchased Natural Science Through the Seasons so I’m not sure what we’ll be using. We’ll be using one of these on our nature walk day. We’ll read the book during our normal science time and take our walk in the afternoon.