This set combines 3 of our products; Pirate Project Book, Pirate notebooking Pages, Pirate Fun Pages, and as an added bonus Historical Figures Mini Bio has been added for free! This study is useable for a wide range of ages and learning styles. So, you can use it with all of your children. It's great if you are planning to do a study of Pirates with kids of different ages, and learning styles, or if you just aren't sure if your child would prefer Project Books or Notebooking. By purchasing the set, you save over $5 compared to buying each product separately.