I used an old frame I bought at a jumble sale for 20p. The frame was dark blue so I sanded it and painted it white and then sanded it again to give it the look you see in the photo. Then I took the back and used a nice wallpaper sample to cover the wood. The last step was to tie some elastic around the back part of the frame and mount everything back again.
This is what it looked like after assembly and before I put my hair clips on it.
For bigger displays use larger frames.