We love learning Dynamics! The books are on my son's reading level! We can read & reread to make sure he's learned all the words in the book. Books in stores & the library are often a little too difficult for him yet. But these books are great! His dad was in awe when he walked in the door to find him reading! Especially because my son has had some speech & language delays. The lessons that come with the program are concise & to the point & leave the child feeling proud that they received another character marker for their efforts! Definitely worth the purchase!