To encourage kids to brush for long enough, this toothpaste changes color from blue to pink after two minutes of ... kids start spitting around 2 years old, while some may not start until 4 ...
Crest, Colgate Lawsuits Target Fluoride in Kids' Toothpaste, Mouth Rinse By Jonathan ... The color of one Kid's Crest product is shown changing to pink from blue as children brush.
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