Pop Tab Plarn Heart applique pattern is all yarn friendly.

This pattern is available for free on my blog at: http://plastiqrecreation.blogspot.com/2012/07/free-patter...

Very easy to make in less than 10 minutes, all you need is:
4 same size, clean pop tabs,
1 plastic bag for main color
if you want to edge it, plastic bag of a different color
size f hook

You just need to know how to do a slip stitch, single crochet, half double crochet and double crochet.