One of the most important things that need to be communicated in sign language, especially for children, is food. Books are available with food signs, and signs are available on the web and in regular sign language dictionaries.
Books
Beginning Sign Language Series: Foods (compare prices) is a thin, colorful picture book of food signs for children.Web Signs and Dictionary Signs
Here are selected food signs and their example sources from the Sign Language Word Reference Guide at About Deafness/HOH:
cookie ASL Browser
Handspeak.com*
LessonTutor
corn ASL Browser
LessonTutor
cracker ASL Browser LessonTutor
dinner SignHear
ASL Browser
eat SignHear LessonTutor
egg ASL University LessonTutor
fish Handspeak.com*
ASL Browser
LessonTutor
food SignHear LessonTutor
fork ASL University ASL Browser
* = Paid site
Updated November 24, 2005

