DIY'ed a tower for my cats from amazon's boxes. I think they enjoy it! : r/ cats
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Make A Cat Tree Out Of Cardboard Boxes Shop, 54% OFF | www.lasdeliciasvejer.com
Amazon.com : Navaris Modular Cardboard Cat House - DIY Corrugated Cardboard Configurable Play Tower Condo for Small Cats, Kittens, Rabbits - 4 Cubes with 2 Bridges : Pet Supplies