My wife and I have always wanted a jungle gym for our three cats, but could never find the perfect model in pet stores. Ever since we started watching Doctor Who at the beginning of 2011, I’d been itching to build a TARDIS (or Dalek) of some type. My wife wasn’t sold on the Dalek, but when I figured out that my TARDIS could serve double-duty as a cat gym, she was sold! Our TARDIS features three carpeted levels, plus an opening in the roof allowing our cats to climb on top. It is made almost entirely of half-inch thick MDF, which I cut out on a ShopBot CNC machine. The lettering was also engraved on the CNC, and then hand-painted. For more on how I made our TARDIS, check out the “How I Made It” tab. The rear panel was left open, except for a support beam which helps stabilize the shelves. I haven’t yet figured out how to make it bigger on the inside.The roof of the actual TARDIS slopes away from the central axis. I knew my cats would want to hang out on top, so a sloping roof wouldn’t be safe for them. I designed a vertical sloping fin to visually suggest the presence of the original roof. I’m not sure my design is completely successful, but the fin does provide an excellent support piece for the rod attached to the dangling toy. I’m quite fond of the toy, which was bought as-is from Target; I think it looks like a baby Ood!All of the lettering was inscribed in the material with a pointed V-bit, then hand-painted. I decided to paint the “POLICE BOX” signs in black text over a white field, which is the opposite of (most) of the original TARDIS designs. It was easier to paint this way, and since I wasn’t going for a 100% accurate replica, I didn’t mind making my TARDIS a little different. The gorgeous blue color, which my wife chose, is also much lighter than the actual TARDIS blue. The cat have yet to register any complaints.We are thrilled to have a TARDIS of our very own that can be enjoyed by the entire furry family. Now all that remains is to convince the wife that we need a Dalek-shaped litter box!