Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Lava Lamp

This item was a disappointment to my mom. She was delighted with the idea of a lava lamp, but surprised that this one did not move as expected. As it warmed up, a slow blob moved into place and stayed put. Also we had to put the lamp on a timer so that it would not overheat. She loves watching the movement of things and had hoped this would work all day. It did arrive promptly and as described, but did not function like we had understood a lava lamp would.