When my youngest daughter was in fourth grade, we built a skeleton out of a rainbow of veggies — the centerpiece of the classroom Halloween party — and not a carrot stick remained. Witnessing a carefully constructed vegetable skeleton disappear faster than you can say "abra cadabra" is a memory I will always treasure.
You can build the creepy creature yourself or go one step further and have the kids chop along after a surgical hand scrub and safety talk. In my experience, when the kids are involved in the preparation, they will devour the creation. The exercise is a fun way to learn the bones of the body, though anatomical accuracy is not a requirement. Multiple radish hearts will vanish before your eyes.
Flash back to her kindergarten class, that same celebration was a full-blown sugar