Obligatory internet cat page
I've built two multi-level scratching posts for my cat (so far). Materials include random items from the lumber yard and carpet scraps from a local carpet shop. When they are low on old samples, I have to resort to a single large piece of carpet, but I prefer the multi-color approach.
Having fun for the benefit (?) of others
I have also made cat furniture for other friends and family:
Lost to history
NO PHOTO OF DEARLY DEPARTED JACK'S POST: HE ATE ALL TRACE OF IT.