Phonic - Explode the Code

I've got this book from one of my friend. I tried to ask Fritz to do this. 

For the first page, it's just guessing the objects from the letters shown. He's good with it.

Then, it's getting hard for him after we're really coming to the first lesson. The book was still hard for him and I prefer to postpone it. Not suitable for him this time, maybe I'll use it for few months later.