J.B.
maybe do some tropical fruit (kiwi, pineapple, star fruit etc) and cut up veggies. maybe gut up some celery and put peanut butter on it with a few raisens (we called them ants on a log lol). or maybe do dirt dessert cups... (i would google this lol) but i think it has like chocolate pudding crushed oreos and gummie worms. i would look on google for chidrens party food.
heres the link for the dirt cups.. (i just googled and clicked on one haha)
http://blog.craftzine.com/archive/2006/10/dirt_cups.html
i think this will be great for her class!