I honestly think a little kid would want to play with a plane or something... I never see anyone building fancy houses out of legos that would need a lego planted tank. Probably more of an adult thing.
Nevertheless, better than anything I've ever created with legos other than pretty patterns in my feet lol.
I think it's cool. My son would build this... he likes the intricate kits, no matter how large or small. He also likes my fish tanks, so there you are. I supported it and shared it. It would be fun if Lego accepts it. Good luck!