Make the sign for food by taking your strong hand, with the tip of your thumb touching the tips of your fingers and tapping them on your mouth twice. This universal sign for eating is the same sign is used for eat, which is done with only one tap. This universal sign for eating is the same sign used for food. The only difference is that verbs are signed once, and nouns are signed twice.
Food is one of the most common first signs. Make the sign whenever you offer food to your baby, when she eats, and just after she has finished. Your baby will be highly motivated to learn this sign, and will quickly learn that using the sign enables her to get food when she is hungry. Hungry fussing, be gone! As your baby gets more advanced, start introducing the names of specific foods, so along with the general word food, your baby starts using more specific words like apple, orange, banana, or cheese.
Eating is one of our favorite signing opportunities. We sign food, we sign more, and we sign all done as part of our meal repertoire.