Instruct: Classify the given Amazon review as either positive or negative.
Query: May cause cancer????

I just received this today and there is a warning label on it that reads the state of California finds this product contains materials that may cause CANCER, and BIRTH DEFECTS! WTF!!! I don't want my 4 year old on something with a cancer warning. I am going to contact the company to see what this is all about and plan on sending it back.