Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Buyer beware!

I just purchased this for my 11 month old son. I got it home from Walmart ($10) and realized four of the animal didn't make any noises! It was two on each 'page' in the same locations, so I knew it was a defect. I took it back and had to try each animal in the store to make sure it worked. It did and after reading the other reviews, it sounds like some are defective. So I recommend checking all the animal sounds (even though you may feel stupid doing that in a busy store!) before you buy. My son loves this and he doesn't have a problem even at 11 months pulling the lever down himself. He pulls it so much sometimes we don't get to hear the end of what the animal says before it goes on to the next one!