T.H.
I have always used Baby Orajel Tooth & Gum Cleanser on my children. I started using it basically when I brought them home from the hospital. I use it on my 14 month old at least 2-3 times a day. This is a Fluoride-Free and Safe to Swallow product. It comes in different flavors. Right now we are using the apple bannana and she loves it. There is also a finger toothbrush.
I have always been told that it a good idea to start at an early age for brushing there gums and teeth. To this day My older ones brush their teeth after every snack and every meal. (They have a tooth brush that they use at school after lunch) So it is a really good thing to install into a child.
Good luck!!