Turns out making crochet hearts are very simple once you get the hang of it. These hearts can be made in a matter of minutes. Use this free crochet heart pattern to make a Valentine's Day Heart Garland. There is a pattern for 2 hearts.
This basic heart starts with a magic ring and is worked in two rounds, using a variety of stitches. I think cotton works very well with this kind of pattern, but you can use any kind of yarn in any weight you like!