Even young babies can understand simple math concepts like counting. Teach your baby the signs for the numbers zero (0), one (1), two (2), three (3), four (4), and five (5) in baby sign language with the following descriptions and pictures.
Form a circle with the fingers and thumb.
Form a fist with the index finger pointing up.
Form a fist with the index and middle fingers pointing up.
Form a fist with the index and middle fingers pointing up and the thumb pointing out.
Point the four fingers up with the thumb resting on the palm.
Point all five fingers up and out.
Chafin, Suzie, Johnston Bell Grindstaff, & Anne E. Pidano. 2009. Knack baby sign language: A step-by-step guide to communicating with your little one. Guilford, CT: Knack.