If you are looking for last-minute Valentines ideas, Amy, over at Living Locurto, has an amazing list of freebies!
I used these adorable treat bag toppers for Anna's class:
And this is how they turned out:
I think they look great, and the bonus is that you use them with normal sandwich bags rather than the fancy "treat" bags! There are even matching valentines, but Anna had already settled on one of the other freebies Amy has listed.