Cut out all pieces, leave a border around the card front & card back pieces so the center score lines are still visible.
Score the center lines then cut around the outlines on both the card front & card back.
Glue the back inner panel to the reverse of the card back. If You are making an aperture front card just repeat this step with the card front & card front inner panel and then cut out the aperture.
Cut slots where indicated on card front then score the side panel lines. Mountain fold the center line then valley fold the two side panels. Re-score the centre line on the card back and score the side panel lines, mountain fold the center line and valley fold the side panels. Open both pieces out.
Glue the center element pieces back to back and score the short center line. Pinch the score line into a valley fold.
Curve the rest of the element slightly between your fingers then open the piece out.
Push the tabs on the central element through the slots on the card front
Apply glue to one of the end panels on the card back and fix to the corresponding panel on the card front.
Repeat this for the other side.
Line up the central element so that it sits in the middle of the card and the two tabs are equal. Fix the sentiment to the card front using two foam pads, one at either end, do not fold the sentiment curve it slightly between your fingers, this will give the card a bow fronted effect rather than a fold down the center.
Apply a little glue to the ends of the tabs on the central element and fix the tab elements in place. They can overlap the slots slightly but do not let them drop below the base of the card.
Hold the card by both ends and gently push towards the center and the back and front of the card will open up.
Your card is complete.