Please, do not do this to a room.
Wallpaper is like the Force: it can be used for good or for evil. This room comes straight from the mind of Vader himself. The print on the wallpaper is bad enough, but the wainscoting also needs serious explaining. We could pretend that the wallpaper was put up after the wainscoting, in a fit of extreme emotional duress, but the sort of person who would willingly combine those two colors on a single piece of wood trim should not be trusted with small children.
Also, is it just me, or does the wallpaper print look like it's staring at you?
Wallpaper: Basso and Brooke for Graham Brown