There are not a lot of animals that are easily dissectable AND widely available in a local supermarket. But squid is one of those. Squids also come whole as opposed to fish, chicken, and other meats we eat — squids have all their internal organs intact when you buy them frozen from a store. Squids are small, easy to cut with a pair of scissors, and don’t have a lot of “parts” — this makes them ideal experiments.
But if you or your child is too squeamish to dissect a real animal, then consider just doing other parts: squid poetry and word puzzles.
There is more than one activity on this printable PDF. Please do those you feel comfortable doing. That said, we had over 700 kids dissect a squid each as part of our local elementary school science day. They all had a blast.
National Geographic video presenting the Humboldt squid.