Teach your baby the sign for the phrase brush teeth in baby sign language with the following description and video.
Form the hand into a fist with the index finger pointed straight. Wiggle the index finger in front of the mouth in the motion of brushing the teeth.
Beyer, Monica. 2006. Baby talk: A guide to using basic sign language to communicate with your baby. New York: Jeremy P. Tarcher/Penguin.Post may include affiliate links.