My oldest son is in first grade, and he helps me take care of the 7 fish tanks we have. He tells the people at the lfs they're wrong sometimes, and the worst part is, he's right.
Give them a lil more credit, it's only the things they're interested in they pic up quickly. The number 47 isn't interesting to a first grader. Now some tadpoles, or something you net out of the local pond/lake, that might interest them to know what's in there. U don't have to take them with you, just take pics of you doing it, so they can relate. 
Give them a lil more credit, it's only the things they're interested in they pic up quickly. The number 47 isn't interesting to a first grader. Now some tadpoles, or something you net out of the local pond/lake, that might interest them to know what's in there. U don't have to take them with you, just take pics of you doing it, so they can relate.
Sounds like a future monster fish keeper.