Given reviews from Amazon, classify those review based on their content into two classes: Negative or Positive.
Q: My son received this for his birthday and my normally laid back and quite handy husband was never so frustrated in his life putting a toy together. After the 3 or 4 hour labor of putting the thing together the toy would not work properly and my 3 year old son kept crying because he couldn't get the doors or elevators to work. Overall it was a terrible experience and we can't even get the thing back in the box to return it.
A:
Negative