https://www.instructables.com/Imprompt-Cat-House-Out-of-a-Carboard-Box/
Imprompt Cat House Out of a Carboard Box : 6 Steps (with Pictures) - Instructables
Imprompt Cat House Out of a Carboard Box: My hand fed to adulthood cat Nilla needed a new home. A cup box from work has become the perfect place.