My own space

Paula is 8 and has requested to have her own space.  We only have 3 bedrooms (master, kids' shared bedroom, guest bedroom).  Not wanting to give up the guest bedroom or letting P stay in the treehouse, I thought of this wonderful idea to "separate" their current room so that P can have her space when needed.   I was talking to another Mom who had her boy and girl share a room when they were younger, now that they are getting older, she added a wall to create 2 bedrooms.  I didn't want to do that to their room which would result in 2 tiny rooms....we clearly did not design this room with kids in mind (there are 2 doors to the outside).  I think we intended this to be the guest room when it was originally designed....so anyway....we added curtains, like what they have in the hospitals!  Such an inexpensive and temporary solution.  The kids freaking LOVE the concept - so do I!  We can try this for a few years before P becomes a pre-teen (oh my God....).