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Haha! So cute!!
how innovative! A cardboard house, complete with cardboard furniture!
Modern Cardboard Cat Scratching Tower
Cardboard Cat Playhouse
DIY cardboard playhouse
Cardboard Cat House
Make a mini camper playhouse for your little ones out of a few cardboard boxes!
Petaled Collar Costume - Martha Stewart Pet Projects
Recycle some of your old cardboard to create your own cat skyscraper.
I always say, give a cat or a kid a cardboard box and they'll make use of it.
Glynn Bebee's Helical Cardboard Cat Tower