The Wind Waker and its spin-offs had pretty unique looks that would go along well with anything aimed towards children, such as this nursery.
The artist behind these walls is Wes. He is the best friend ever, as he helped Bradburn who wanted to share one of the things that had given so much happines, The Legend of Zelda video games, with his (at the time) unborn son. Wes started to work, admittedly receiving some help from Bradburn, and the end result after 150 hours was this: walls in the cell-shading art style of The Legend of Zelda: Wind Waker, Phatom Hourglass and Spirit Tracks.
You can see more of the room in the video below: