Instruct: Classify Amazon reviews into positive or negative sentiment
Query: unsafe and frustrating

We got this for our 3-year-old son last Christmas, and he was thrilled with it. He played with it for about 5 minutes and was very frustrated because the arm would not stay in place, it kept crashing down no matter how securely kid (or parents) would try to set it in place. Unsafe for fingers or anyone in the way of the arm when it goes. We tried playing with it for a few days and ended up exchanging it for the excavator instead, which was a big disappointment -- this had been his very favorite thing under the tree. Extremely poor engineering on this one.