When choosing a theme for my sons' rooms, I try to find something that will grow with them or allow their input as they develop interests. (For example Søren's room has transitioned from weather/sky to space.) Isaac's room has a travel and transportation theme. The past couple weeks I've been creating and assembling art.
The NATO alphabet poster took many attempts before I settled on one I was happy with. I could have scanned and photoshopped a final version, but I wanted it to be all hand-done.
The art wall is still a work in progress, but I'm pretty happy with the configuration and the major art pieces for the time being.
The "hello" art is from Loopzart on Etsy. The wall decal is the text of "Around the World in 180 Days" and is available to purchase at Litograph.
While putting together Isaac's room, I used these Pinterest boards - one and two - to keep track of ideas.