Customizing: Room-divider

I have the bestest co-worker ever! Today he brought me this - apparently it is leftover from pieces for a puzzle game for his little son. It's already folded and stands like that, looking like a room-divider. I don't even need to paint it as it already has a kind of wood design.

All I need to do is glue some paper behind, as at the moment the holes are see-through. I just can't decide whether to use simple white paper or to go for something more fancy and colorful. What do you think?

7 Inch figures for size reference.