Thank you for all of the wonderful ideas and information.
I think I will make an ingrediant list of what I am using a few days in advance and have the teacher send it home to the parents of the nut allergy.

I loved the grave yard idea.
I have the jello molds that are the brain and hand. Maybe I can use one of those for my oldest child who is in 4th grade. They would get a kick out of them.

After reading your post I thought I would also have a separate bowl of nut free items to hand out to those who have the allergies. Our neighborhood does an afternoon parade and families hand out treats at the end of their driveways. I know many parents would be thankful and the kids VERY happy.

Thanks for everything!