My IG feed is equally full of people making these adorable hearts and people who want to learn how! Since it's so easy, I thought I would show you! I suggest about.com for learning certain stitches or methods. Or you could google "How to..." and get lots of results, one of which will suit your learning fancy. Treble and triple are often interchangeable.
And in case you like to see directions all at once...here they are for you!