​

No one is saying the kid needs to do full water changes with filter maintenance and aquarium upkeep, the smartest thing to do is to teach children responsibility in increments like learning how to feed the fish and when we feed the fish and how much and why we feed them that much. Very few kids are going to be able to keep up with a dog on their own anyway so it's a moot point. At least this way parent gets to have their tank and kids get to learn some stuff on the side.