Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Terrible bathtub crayons

We have had many bathtub crayons, and there is a wide range of quality out there. These are some of the worst we have used.These are quite water soluble and "melt" all over the place. They don't write very well at all. And after a short time, the crayon part falls out of the plastic holder.So - do yourself and your kids a favor and try a better brand.