How to Make Hearts Edit
First, play the movie theater 3-movie stub game three high evolve things like Brie, Sun Onion, and Magical Creamsicle or something like that.
Secondly, combine those three things to make an item, which will most likely be a heart gem.
Thirdly, combine the heart gem with two low-rarity food or items to make hearts.
Tip: To make more hearts, combine heart gems :3