Teach your baby the signs for the letters s, t, and u in baby sign language fingerspelling with the following descriptions and videos.
Form a fist with the thumb resting over the index finger.
Form a first with the thumb sticking up between the index and middle fingers.
Hold the index and middle fingers together and pointing up. Rest the other fingers and thumb on the palm.
Porpora, Tracey. 2011. The complete guide to baby sign language: 101 trips and tricks every parent needs to know. Ocala, FL: Atlantic Publishing Group, Inc.