your tanks look awesome. i have found that my kids are more calm with the tanks. especially at night. and it gives them a sense of accomplishment and responsibility. my 2 year old and my 4 year old are always helping maintain their tanks (as they each have their own). it can be very fun to engage your child with a fish tank. and also educational. especially with live bearers. when they have babies....it becomes a counting and nurturing game.