Wrap in paper with bit of excess on top. Tuck it in. Roll in a layer of paper inside to keep things clean (there was rust in mine). Secure everything with tape.
Stickers are your friends! Thank you @wisiaden for the cuteness! π
If you want another layer of protection, wrap the whole thing in book cover plastic.
Tadah! I have a nice pen holder for my calligraphy stuff. π