Definitely shows plaque, can stain sinks
These tabs definitely show the plaque, and my children use them once a week in order to show me how well they're brushing. The darker spots show older plaque and the lighter pink shows newer plaque or food debris.<br /><br />BE WARNED: If your children don't rinse the sink, or are filthy little hobbitses like mine, you may end up with pink stained porcelain. Have your children use this supervised, not because the product itself is dangerous, but because it will stain your countertops and sink. That's the only reason for 4 stars instead of 5.
Rating: 4 stars