Mosaic wallpaper for children's rooms designed in France by Minakani, as featured on Bobby Rabbit
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Something like this for the wall behind the crib. Except for using the outlines of safari animals in white, with gray background. Unless all the walls are gray, then this wall could be white with outlines in gray, or black? or even goldish cream?
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birch tree wallpaper -- I prefer the light trees on dark paper, but this is lovely also. I'd still use either (dark vs light base) as an accent/separation wall between rooms
Vintage Wallpaper - how cute would this be as an accent wall in a nursery?!