Instruct: Classify Amazon reviews into positive or negative sentiment
Query: We've never seen it run!

I purchased it for my son's 4-year old birthday. We opened the package and installed the tracks. My son was very anxious and excited. We put in 6 brand new batteries and it just wouldn't run. My son was so so so disappointed. I felt so sorry his birthday was ruined. Unfortunately we have thrown away the boxes and the manual so we cannot return it. The Customer Services in Scientific Toys won't get back to us and we still don't know why it wouldn't run. We just wasted our $40.00. It would be very helpful if someone can kindly share a copy of the manual or some troubleshoot tips.