not as good as the red GUM tablets
OK, but I prefer the other, red GUM disclosing tablets.  These don't really show more plaque, the blue/red difference isn't as pronounced as they claim.  They also don't dissolve as well.  Basically they just contain more, darker dye which makes the staining worse.<br />But if it helps (or motivates) the kids to brush better, they're fine.
Rating: 3 stars