Why do I buy them things

like beds when they would rather sleep on the floor

(blurry picture because I didn't want to use the flash for fear that I would wake them! Plus, the room is too small to use my 50mm)

under something like this:

For the past several nights, Hannah and Emily have been sleeping on the floor in a make-shift tent/fort that they created under Emily's loft bed. I'm not sure how this can be remotely comfortable, but they seem to like it, so I let them sleep there hoping it will be one of those things they remember doing from their childhoods.