Fish list above is great. To add how about a pistol shrimp and goby pair. Could be a good educational pair-up to teach about Symbiotic Relationship.
We could provide this type of information about the inhabitants and such via a laminated printed copy
"symbiotic" relationships:
There are three different forms of symbiotic relationships: Mutualistic, Commensal, and Parasitic.
In a mutualistic symbiotic relationship, both organisms benefit from the relationship. This is the type of relationship the Pistol shrimp shares with his goby friend. In a commensal symbiotic relationship, only one of the organisms receives any benefit from the pairing, though the other organism is unaffected by it, either positively or negatively. In a parasitic symbiotic relationship, one organisms benefits at the other's expense.
Additional idea is Anemone (Home grown for health. hint hint micki
) and clownfish. What other live inhabitants (easy to keep) would be educational?
Scarlet Skunk Cleaner Shrimp - Awesome looking, super hardy, active and doesn't hide like other shrimp and cool how it cleans fish