Review: Leapfrog Reader

I had purchased a Leapfrog Reader for Big J during a Robinsons Sales in June 2015. It came in a bundle which includes the Leapfrog pen and 2 of the compatible books: Cars and Brave. It comes together with a Sample booklet for Big J to try on the writing and also, pages from various books for the Leapfrog pen.
Initially with just that 2 came-along books, Big J was not interested in them. I then purchased the other books, mainly for kindergarten level, hoping he might gain interest in them. True enough, he started reading them.