I used an empty box of 10 writable CDs and a paper napkin with 3 cute teddies who sing Christmas carols. I’m not sure if this type of CD box still exists. I think nowadays the CDs are packed in plastic foil. But mine was an old type of CD box, it was a thick and stable carton.
As usually I painted white those areas where I wanted to put the pattern and after I painted red around it. In the end I put two coats of varnish on the box.