Step 1
Using a ruler as a guide, take the rounded end of a paper clip (or a ball point pen that has run out of ink) and press along the dotted lines of the heart print-out.

Step 2
Cut the heart print-out from the sheet by carefully following the solid, black lines around the edges...

Step 3
...until the pop-up piece is removed.

Step 4
Flip the pop-up piece OVER so the dotted lines are not visible.

Step 5
Lay the pop-up piece on a flat surface and take hold of the right side.

Step 6
Carefully fold the entire right side over onto the left side and crease it flat.