Get it? Valentwines... twine? *snicker* Oh I crack me up. Ish.
Right! So this is wicked easy. Supplies are cheap... and you only need a couple things.
Twine (or yarn, or string... ) and some kind of fabric stiffener. I got this stuff by Plaid... called Stiffy. Yes it is really called that. I know, I can't believe it either! Could you use podge? I don't know... but if you try it, let me know!