In my experience kids really couldn't give a crap about the morphs or anything about the morphs. Maybe some that are drastic difference, like BEL, super cinny, pied. Butter,pastel, or pin compared to a normal they don't really seem to grasp it. But thats my experience.
How they live in the wild and what they eat in the wild and captivity is majority the educational questions I get from little ones. Be prepared to answer questions like "Can I hold it?","Will it bite?", Can you fed it right now?", "Is it slimey?", ect. I agree a husbandry lesson would be great.