To sign sharp, we place our non-dominant hand with fingers together and palm facing down completely flat. We then take our middle finger of our dominant hand and move it from the top of our other hand to the end of our middle finger, as if in cutting with a knife.
Teaching our babies to sign sharp is important, as it relates to their personal safety. Introduce your baby to the concept by showing them needles and explaining the hazards of knives and scissors.
Babies are full of curiosity, and they will soon figure out that Mom and Dad often use sharp and possibly dangerous objects. Teach the sign as a warning to make sure your baby is aware of danger ahead of time.