Instruct: Classify the given Amazon review as either positive or negative.
Query: NOT recommended

I think this product misrepresents itself. The dolphins do make noise, but I would hardly call it singing. If you tap them, if you're lucky you hear a slight "bing", but some of them are completely silent. The rings do not stay together at all and there is no symphony going on in this tub. It's cute, but takes up room, and not with the money. A plastic duck for $.99 is as much fun.