Instruct: Classify the given Amazon review as either positive or negative.
Query: Great at first then disappointed

I initially thought this was a great product. The bright colours and lights and great sounds really captivated my baby's attention. However, less than a month after purchasing this product the sound went. I thought that maybe the batteries had died, so I put new batteries in, but still absolutely no sound. I am so disappointed!It lasted less than one month!