Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Better if it's mute.

I bought this for my 2.5 year-old. I usually love all the M&D toys I purchased for my boys. This is my first disappointment. This puzzle has light sensors and I think this is a bad choice. It annoys me that it is not reliable and it says the wrong letter almost 70% of the time! How is that going to teach a child his ABC? Now that he's 3 and knows all his ABC he will laugh at how wrong this puzzle is, and thinks this is "silly". And if this is left in a certain position in a semi lit room, sometimes it will just yell out an alphabet non-stop. Also, this doesn't have an on/off switch button. So to stop the sound, I have to keep it face down so no light can get to it. Now that we have a younger child, we'll just have to take off the batteries in this puzzle for him to play as a normal wooden puzzle so as to prevent teaching the child wrong association to those alphabets! If you do have this, please use it in a well lit (and with even lighting) area.