okay well my two cousins are away for a trip and so me and my parents are designing/remodeling their room. One is eight years old and she is into princess and the other one is 15 years old and she is into what is now modern, like retro stuff. Alright so unfortunately they have to share room. They both agreed with the sky, baby blue background color on the walls and white on the ceiling and baseboards,doors, bathroom, and around the windows. Okay so then just a few hours ago her little cousin called me saying if we can add crown designs but then i hear her older sister screaming - so basically there is an argument. Alright so now i want to know what can i do to make them both pleased/satisfied? I was thinking of having diamonds going around the walls, and then at the bottom of the wall add some flowers but my older cousin doesn't really like flower things. So what kind of designs will go just perfect with them both? P.S they are not into hearts, flowers, crown, princess, splatter paint. i forgot to mention im not willing to do splits because its not going to look right.