^^^ Sounds like you have the right idea there RLeo.
I usually dissect a few thing with the kids each year at home - frogs, worms, fish, rats, various things we find in decent shape that the cats offer up on the back porch. Later this year, they want to do a cat (we ordered it - I'm not volunteering one of ours
They also like owl pellets
. When I first ordered those and brough them home, I thought my wife would puke - but they are pretty cool and you never really know what you'll find - kind of like cracking open the WWGHA mailbag!