You know, i'm all for cats having lots of toys , i mean its like a cats version of toys-r-us here, but i do draw the line somewhere.....come on people, the cats dont know what a "cardboard castle" is........its a bl@@dy cardboard box.!!!!! and a very expensive cardboard box at that. Theres a guy out there cutting little bits out of a sheet of cardboard and making a mint ..lol...prices i saw were from £17 ish up to £40 for a cardboard box, im sure if you ask the wherehouse manager at tesco's nicely you would get a shed load of cardboad castles for free ......lol