I strongly recommend this ...

I strongly recommend this from birth until your child is old enough for for their first toothbrusht. I will also be recommending this (even if I have to buy it) for any future grandkids too.
I used the older version of this when my 33 yr old was little. I also used a slightly newer version of this when my 24 yr old was little along with an older version of Orajel Toddler Training Toothpaste. And for my 8 yr old daughter when she was just a little one, a still newer version of this silicone finger toothbrush & gum massager, again with Orajel Toddler Training Toothpaste.
I then used these, until she was old enough for her first toothbrush. I works great, and I had no trouble with this product over the years.