creating Valentine's Day cards on Storyboard That. Another option is to use the free card templates that are available on Canva.
Canva offers design templates for almost every card-giving occasion. That includes offering Valentine's Day card designs. In the video below I demonstrate how to use Canva to design cards.
If you're wondering if you can use Canva with students under the age of 13, please read this statement from Canva's CEO Cliff Obrecht.