I like the kodomo slim toothbrush for 0.5-2 years old. Very soft and slim bristles that are gentle on the teeth. For 1yo, I think that’s better than finger brushes because baby will bite down on whatever you insert into the mouth. You can either use fluoride free toothpastes or those with very small amounts of fluoride. I also used kodomo toothpaste (size of rice grain) when my LO was at that age.
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