Don't worry....we change our minds XDI would love to do a moss only tank but maybe when the kids are grown up and move out, but my 8 year old did tell me the other day that he wanted to live with us forever. He will change his mind by the time he's a teenager.......right????
Perhaps though its something you could do in a smaller tank, as like a pro to-type idea...besides, if your son gets into the hobby as he gets older, you don't per say know what kind of things he'd want to do with it
Also, tanks looking great OVT