I was having a hard time trying to teach my daughter how to brush her teeth effectively, then someone told me to try this Listerine Agent Cool Blue plaque detecting rinse for kids. My daughter tried it, and has used it every night since! It is a mouth rinse that is tinted blue, so when the child rinses their mouth with it, it dyes any plaque blue so the child knows where to put extra effort in brushing. My daughter actually slowed down her brushing, to make sure she got all the blue spots off. She has told me that it tastes great, she chose the Bubble Blast (bubblegum) flavor, but i know it is also available in at least one other flavor. To me as a parent, this is an essentail tool for teaching children how to properly brush their teeth, and to show them where they need to concentrate extra efforts.