Reasons why we love our Bamboo Toothbrushes : they are made of sustainably sourced MOSO bamboo, which is not only an amazing eco-friendly resource, but is also clean on both the micro (BPA-free) and macro (biodegradable) levels. The soft angled bristles help cleaning hard to reach areas of the mouth, for a gentle and efficient clean.The American Dental Association recommends changing your toothbrush every 3 months. Bamboo can change color over time, which is completely normal.Children should be supervised at all times while brushing their teeth. Do not let your child bite or chew on toothbrushes.