Cat Amazing STACKS! - Modern Cat Condo & Modular Cat Tree - House & Tunnel Cubes for Cats - Made in USA MODERN CAT FURNITURE  The Original Award-winning Cat Amazing STACKS (by Catty Stacks) are stunning cat cubes that makes unsightly large cat trees are a thing of the past! ULTRA TOUGH & DURABLE  Super strong and long-lasting cat houses to fit any decor! Heavy-duty corrugated ultra board cardboard easily holds up to large cats jumping, playing and sleeping! ENDLESSLY MODULAR  Stack these sturdy boxes high & secure them with our patented clip system (clips and bridge included!) Mix & match the colors (white, green, brown & more) to build an entire configurable cat condo for your favorite furball! VERSATILE PLAYHOUSE  Its a cat tower, climber, cat tunnel, perch, cat lounger and activity center all in one! Add a cat bed, scratching post or pad, and some favorite mouse and feather toys for an all-in-one interactive play center for indoor adult cats and kittens! MADE IN USA  Crafted from high-quality, cat-safe and planet-friendly materials for long-lasting durability and safety, providing your cat play and enrichment for years! Two STACKS Cubes One Bridge Eight Connecting Clips Assembly Instructions &amp; Video Link