You may not want litter boxes on the main or second floors but you need them there. Like I said if they wait to go there is no way they are gonna make it from the second floor to the basement to use. If you don't want to see the bozes then maybe hubby could build a nice covered box with an opening that can match your decor and no one will know there is a litter box there except you and the cats. But trust me on this one. If you don't have boxes on every floor you can almost be assured you will have accidents. Kittens play and play and wait til they just can't wait no more to use just like little kids you need to have a litter box close so they don't have accidents just like little kids.