Really like the idea of a backpack wall with the chalkboard overtop. This way you can write reminders (when they're old enough to read) so that you don't have to constantly tell them. Erase reminder once done.
Gray rug and walls with a white bed can also be a glamorous home decor idea, provided it is contrasted well with white curtains or grey walls, just as this particular room. I would add some bright yellow to add a happy warmth to it!