Core the apple with an apple corer. Cut into narrow slices so that the hole is in the middle (looks like a kind of tire). Lay out the slices on a plate.
Peel the orange and cut it into thin slices. Place these on the apple rings.
Cut the banana into slices. Cut off a small part of the slices with the knife so that a straight line is created where you can start the heart shape (about a third of the slice). Place the small heart-shaped cookie cutter in the middle of this straight line and cut out half a heart. Place a whole heart out of two halves on the orange. Continue this until all discs are occupied.
This recipe can be expanded to include other types of fruit.