Not for feral cats for CAT DIY Feral Cat Shelters Pet Projects. I might actually do a couple of these for my indoor/outdoor cats to use in bad weather emergencies next winter.or when they're just too stubborn to come inside.
Great use of small space with repeating elements (storage boxes on wheels, white shelving) and an injection of colour with a red sofa and the blue chair in the background. Just enough to stop you from getting bored. From IKEA catalogue.