Here are some designs for your daughter's room. The color palette was created based on your "house" wall art/shelf and lamp ( as well as your current wall color). I think a combination of gray/silver and pink would go well with the items you already have. 

First, I would create an accent wall by installing a wallpaper mural with perspective, to make the space feel bigger or choose a soft pattern wallpaper and wrap the whole room with it to unify the space. The next step would be to decide if you are ready for a twin bed or want to keep the crib. Getting a rug is next..