Jun 11, 2013 | updated: 10:51 AM EDT, July 2, 2014
Put all supplies and tools on the floor and prepare the space for your work.
Take the hangers apart with pliers and shape them as shown on the picture, using a tape on the top (wide enough to put the pillow and the cardboard inside)
Strech your t-shirt on the construction leaving sleeves loose for additional entrances or tie them at the back of a tent. Here it is. The easiest house for cats ever!