Spray paint mason jars and turn them into soap dispensers!
DIY: Wall Mounted Headboard - this tutorial details how to mount & secure a headboard to a wall.
Kid's closet--actually looks like they created a closet out of a space in the room by putting up shelves. Out-of-season and too-big clothes are in labeled boxes at the top. Keep a box there for clothes they outgrow; fill as needed. Dresser in the closet. Basic tall trash can used as dirty clothes hamper. Dresser top could double as changing table.