First off, I do NOT recommend this curriculum for younger kids! It is just way too advanced, with highly complicated words and concepts. So in a way, you shouldn't even need to use this junior notebook.
However, if your older kids (at LEAST junior high age) are going through this curriculum and you have younger kids that desperately want to follow along, this is a good notebook to get. Lots of colouring pages, good Bible verse copywork, and my 6-year-old gets to be like her adored older siblings.
My 6-year-old daughter is loving this book. She can color while I read, but it also has similar activities to her older brother who is using the other journal. We plan to go through this again at some later date when she is ready for the harder activities. All around great book.