What you need:
-scissors, some cardboard + a pencil
-thick red paint + a brush
1. take the cardboard and draw whatever figures or words you want to put on your wrapping paper.
make sure the shapes aren't too complicated, so they're easy to carve out
2. when you're done, start carving out your drawings, so that you have a couple of models
3. put the models on the packaging paper and fill in the cut-outs with red paint