This one leans into the fun. Your cat drops in through an opening at the lower left, as if stepping into a warp pipe, and can either settle into the enclosed space or scramble up through the escape hatch on the right to reach the top. No piranha plants involved, just a cozy den with a bit of nostalgia stitched in.The kit ships with three removable matte wall decals to set the scene around it. In our own place, the right cubby became prime real estate, so often napped in that a sleeping cat would block the top hole and claim the spot as their own. It is designed for 16 inch stud spacing.