You can personalize these small projects to suit your taste. I gathered three projects to give you an overall view of what is possible.
You can interact with the Frames wallpaper by painting some frames and hanging photos or cute papers. Casasugar suggested you put magnetic primer under the Frames wallpaper to be able to use magnets. The magnetic primer means that you can do it with any color of paint. Look at the adorable kid room. Finally, for the more traditional magnetic boards, check out a DIY project on Curbly.