I'm going to try to post a link to DS 1 and 2's bedroom. We have done major decluttering and simplifying in here. They use the desk to study. They keep their favorite books in the bookcase. Their in-season clothes are in the underbed drawers.
The closet (not pictured) is in pretty good shape, but not quite there yet. It's small, though, so it shouldn't be hard to organize!
All of their toys are in our playroom.
We need to paint the walls in their room. Any color ideas? We need to stay neutral, since we do plan to sell our house within the next year or so.