Big Purple Mess!
I ordered these for my 7 year old to use. He tried one. Turned his mouth, the lower half of his face and my whole bathroom sink purple. We spent the next 20 minutes trying to clean it up. The next day I broke up a tablet and gave him maybe an 1/8th of it. It was still a mess. Didn't stain the plaque darker that we could tell. However, his teeth are pretty clean now that he's had to brush 4 times to get rid of it all. Stained his toothbrush as well.
Rating: 1 stars