Would be fun kid hideout space! Awesome dog kennel under the stairs design idea. If you want an indoor dog house, utilizing the space under the stairs for a cozy, attractive and practical space for dogs is a good idea! I love this design.
My older two boys share a room and sleep in bunk beds. Since we moved them to bunk beds it's been great as it has opened up a ton of space in their room for quiet time away from the chaos of the rest of the house. I love bunk beds.
"The living cube" I moved into a apartment studio without storage room. So i made a minimalistic cube design with a shelf for my vinyl collection, my TV, Clothes and Shoes. On the cube is a guest bed and inside the cube is a lot of storage space.