What kind of infant toothpaste would you recommended for a 7 month old?

Orajel makes a no fluoride kind for 3+ months. The kind we have has elmo on it.

We have been using Babyganics, it's also fluoride free.

This is actually such a good question. I've just been using water and letting my son brush his teeth with his toothbrush. I didn't even know there was toothpaste for babies under 2