Homemade cat toys: how to build cat houses, scratching posts...from scratch - Versele-Laga
How to build a catio for your cat - BC SPCA
Amazon.com: YITAHOME Outdoor Cat Enclosures Catio Large Cat Cage Cat House with Roof Hammock Platforms DIY Pet Kennels Playpen for 1-6 Cats Rv Garden : Pet Supplies