Produce for Kids (PFK) is a great resource for helping parents and kids understand the benefits of good nutrition and regular exercise. PBS KIDS partners with PFK to spread the word, and so I wanted to forward the information on to you.
You can find PFK at http://www.produceforkids.org/index.html. There is a collection of links providing ideas for addressing nutrition and exercise in your classroom as well as some great kid-friendly recipes.
These are both great resources and I encourage you to take a look and pass them on.