Instruct: Classify a review into positive or negative sentiment.
Query: You don't need it

I don't think you need the book if you are somehow able to play with your baby. The games described are very basic. You are probably playing them accidentaly. There is basic information on how babies interact at what month. This you can find inWhat to Expect the First Year (What to Expect (Workman Publishing))or similar books. You may need a Gymboree class, Gymboree outfits but you don't need this book.