Ok, I wanted Lochlan's room to be cute enough for a nursery, but be neutral enough to either grow up with him, or become a guest room or office later. I still don't have any curtains or some of the furniture I want to put in there (like a kid-sized table and chairs and a rocking or gliding chair for me), but I think you can get the gist of the idea.
The first pic is the before. Notice the super ugly wallpaper. You can't tell from this, but that border has pictures of stamps, and maps, and weird foliage.
Between this and the next picture, we painted the bottom section of the wall Antique White and I cut some strips of 1/8 inch tempered hardboard (one sheet is less than $10 at Home Depot). I painted those the Antique White color and spaced them out every 2 feet. I was going for a board and batten look. Jaren nailed those on and added a chair rail to finish it off.
I also got these wooden letters to line up around the chair rail to help Lochlan learn his ABCs!