Children have wonderfully creative minds and I can just see me envisioning a stair case / slide combo like that as a kid and thinking it would be great fun. One vivid memory from when I was young was wanting a place that was a big empty loft that was so big I could roller skate around in it.

Times change, needs change, and practicalities rear their ugly heads. But part of me thinks that a combo spiral staircase and slide would make a great fire escape on the back of a townhouse :)  But then I worry about what it would cost and the budget…

[The chevron pattern you see in the wood floor in that picture is another detail we've been thinking about incorporating. So there's more in that photo than you might think.]