Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Broke after only a few months

Had this for maybe 2 months before it stopped vibrating. checked the batteries, put fresh in still didn't work. then the part that goes over the chair with the rainforrest animals shorted out. started randomly blinking and the animals would no longer move up and down. it basically turned into something I just strapped my son in and that was it. maybe it was just mine - but seems like it could use some improvement.