Usage: Use the bite flash card in conjunction with the food and also apple flash cards. The goal is to help baby make the connection between the action of biting and objects her or she is likely to bite. Also consider combining the sign with teaching a baby not to bite.
As baby gets more advanced you can introduce the added challenge exploring sizes by introducing him or her to signs like small and big, with the idea of teaching your little one about a big bite and small bite. Consider using a banana or apple. You may also wish to introduce baby to a variety of food items on their plate and ask them if they would like a bite of apple and cheese, and bread or pizza respectively to help your baby identify and communicate food preferences
For an instructional video and tutorial on how to make the bite sign, see here.