We received these books along with the VTech reading pen in the form of a reading worm. Each time your child wishes to read a new book, the parent has to insert the new cartridge and firmly depress the on/ off switch. Fortunately, this switch cannot be accidently depressed.
There are plenty of books that follow current TV shows that our daughter takes a great interest in. She has the option to press the pen onto shapes in the book that will begin with page being read. She can also press the pen to pictures and the pen will state the appropriate word or she can press the pen onto a word next to the picture and the pen will read the word. It took a while for her to get into the reading system but now she loves randomly pressing the shapes, pictures and words in her vogage of discovery.
This reading system must be used in compliment with teaching her to read letters and say the sounds of each of the letters. It greatly helps in the repeative stage of learning that parents may not necessarily have the time for. It is also progressive into primary school reading age. However, you may need to keep eye on your child otherwise they may colour on or tear the pages in the books.