I had just demonstrated the "star inside an apple" trick while we were studying seeds. I took a bite from the apple in front of the students and there was nearly a riot...

Students: (in one big, indignant chorus) Hey! You can't eat that in front of us! That's not fair! Give me a bite! Yeah! Give us ALL a bite!

Cody: (the voice of reason) Oh, come on guys...she deserves a treat. She has to be with kids all day!