cabinets, stairs with flip up steps and very narrow stairs. Each step goes up one at a time for each foot. It is sort of spaced so you are putting one foot per step with a steeper step. Very space-saving.
Wow! Never thot of this but would be so nice in the kiddo's rooms! Would give them more room to play and I wouldn't have to worry about bumped heads on those nasty corners! How To Build An In The Wall Space Saving Dresser