Play offers many enjoyable opportunities to develop language. The most critical aspect of play as it relates to language development is that children learn to think symbolically. They learn that one thing can represent another thing. It is this very kind of thinking that is used in language.
Have your child use his/her whole body to act out Pepito the Brave. This will help your child internalize and understand what is happening in the story. This process will later help them understand what they read.