just got back from teaching 50, first graders about fruits and vegetables. Here is what we did:
Read the story, "Gregory the Terrible Eater"
This is an adorable story about a goat that would not eat anything but fruits, vegetables, bread, and butter. This disappointed his parents terribly, as they wished he would eat tires, shoelaces, tin cans, and cardboard. Everytime I said a food that was good or delicious, they would pat their tummies and say, "Yum, yum". When I would mention a "food" that was not good, like boots, and coats, they would stick their finger in their mouth and give me a disgusting look.
I brought a bowl of all the things that Gregory ate, and pretended to eat it.