This will be my 4 year old daughters room and I'm not sure how to finish the niche. the room is painted in Benjamin Moore light pewter and the inside of the niche is painted white and i was planning to put some shelves for frames, books or decorative stuff. should I put an iridiscent or white textured wallpaper on the back part of the Niche or white beadboard? or leave this way and install white shelves. Should i install some flat trim around it? its not completely centered on the wall.