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.
This is a perfect combo of my two favorite ideas for that space under the stairs leading to the basement. A reading nook AND book storage and shelves . assuming that there is enough space for this there.
DIY Storage Ideas - DIY Dog Food Station with Storage - Home Decor and Organizing Projects for The Bedroom, Bathroom, Living Room, Panty and Storage Projects - Tutorials and Step by Step Instructions (Diy Bathroom)