I loved changing Mac's nursery into a big boy room that I call "Farm Chic." Navy is one of my favorite colors and I added pops of green in the art, pillows and side table. For a touch of manliness I used my husbands pig mount and deer hooves hooks over the bed.
I could totally do this in our house! Our gallery wall and paneling wraps around to right outside Mason's room, I might just have to slap a few coats of chalkboard paint on there! And maybe some magnetic paint under?