1. Cut out a 10.5 cm square out of the red corrugated cardboard.
2. Turn the square over to the smooth side and trace a larger heart (about 9 cm at the widest point) in the center of this square and cut it out. Using the cut out larger heart, cut a smaller heart out.
3. Adhere the square to the center of the card. Open the card and poke a small hole through each of the 4 corners, about 5 mm from the edge. Place a white heart brad in each of these corners. Cover the inside of the card with a second white square to hide the poked holes.
4. Adhere the smaller corrugated heart to the center of the heart cutout. Then glue an acrylic heart onto the small heart.