I am just in the process of ordering them myself for my 3rd daughter. She will be 5 in June . But is more then ready for this series right now . I was able to scan some of the sample pages off of the link everyone gave you and she absolutely loved the pages. So I'm sold on the program . Also if you order the series from Rod and Staff you will get the full series of the ABC Series. They just came out with a new workbook for the ABC Series ,, called Going on Eagerly . Rod and Staff is planning on making more sometime in the future ... Hearing and Helping ,,Inside and Outside ,, Just Thinking and Choosing ,,Keep Doing it Carefully ,, and Learning More and More . When they plan on releasing these ? I don't know .