Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.
One example: I've read this book with much expectation, it was very boring all through out the book
Solution is here: Negative
Explanation: Review writer does not like the book because it was boring, therefore it is a negative review.

Now, solve this: You cant go wrong with these puzzles! My son loves to play with them and discover whats under the puzzle pieces. It helps a child develop number recognition which is so important. Very well made and durable! SOmething I will surely save for the next generation.
Solution:
Positive