Black and white seems to be the trend at the moment but pulling it off can be quite difficult. Although buying those items are easy, its a hard balance to make the room feel welcoming for a child.
If you are sure you don't want a pop of colour, then it is all about texture, patterns and layering! Be brave by mixing up patterns, you can easily do this with a black/white room! A beautiful pale grey wall would look great with this palette.