Here's another activity worth trying on or before the Valentine's Day, it's called A Valentine's Surprise.
Essentially, it's a fold-out card that your students will make - it contains a pleasant surprise. The 2-page handout (kindly provided by Evan-Moor Corp) has everything you will need: the detailed instructions on cutting, folding and whatnot.
Your learners will surely have a lot of fun creating this lovely Valentine's card. They will have even more fun seeing their friends or loved ones open the card!
Happy teaching!