I really like these jr notebooks for this science series. The coloring pages keeps the ps and k in the loop as to what we are studying and the 1st and 2nd graders challenged enough to enjoy the tasks. The reason for the 4 stars and not 5 is that I wonder why they came out with the jr zoo3 before zoo 1 and 2, and they are a bit pricy to me. Zoo 1 would have been nice to do this school yr with the jr notebook and not jump to 3. It is money well spent though when the preschooler explains to everyone about how her digestive system is working completely.