I love the idea of something like this for the boys. Maybe even a curtain on each so the have more privacy in a shared room with two introverts. Would need to put all three of them in the master though.
Creative Cardboard Toys from Studio Roof - Petit & Small
A stepped concrete garden planted with herbs and flowers marks the descent to the house. The courtyard is the focal point of the U-shaped structure; there is clear visibility between the kitchen on one side and the children's bedrooms on the other.