Well... the pots already had a rather large 'vented' hole on the bottoms.... so I cut it out and put the hole in the center top. Put one in there while Eddie was in the other. He came out..... looked around.... went over to it and I swear it looked like a kid on a set of monkey bars!! He was in and out, on top raising up, half in... looping back.... just playing it looked like. I put the other one in there and he went back and forth, 'playing' on them!! Now he is settled in one and will every once in a while 'peep' out as seen in the picture. I think he loves his new more spacious rooms!!!