Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Is this invisible paint?

I've read the other reviews and perhaps some of us have purchased faulty sets. I bought the set with just the paints and foam fish, and the "paints" don't show up at all. I might as well hand my kid a bottle of colored shampoo and say, "here, smear it on the shower walls." It would be just as fun and cheaper. What a crock. Unless there is a pair of special glasses out there we're supposed to have--or a black lite--lemon juice?... Oh well, I'm e-mailing the company!