One of the things about having healthy snacks is that they need to look fun. Here is an example of yellow carrots that have been cut into a heart shape and added to a salad.
You simply take the long portion of the carrot and shave off two sides to make the tip of the heart, and then cut out a triangle through in the middle . It will look a little rough but you will be able to visually see how, when you make slices, it will turn into a heart shape.
Then just thinly slice and it’s very easy to get tons and tons of hearts! Here is an example of a salad I made with hearts and purple cauliflower.