Fold your white cardstock into a card shape, keeping the surface clean so the pink heart stands out.
Cut a heart from the pink paper, making it slightly large so it hides your secret note underneath.
Write your hidden message directly on the card base where the heart will sit. Keep it short so it stays centered after tearing.
Lightly glue only the edges of the pink heart onto the card, avoid the center so it tears easily.
Add a dotted outline around the heart using a pen to give it a stitched look and guide the tear line.