Pick two colours of card that go nicely together and fold them in half.
Make yourself a heart shaped template out of paper.
Draw around the heart on to the front of the card using a pencil.
Cut out the heart using a stanley knife.
Glue the inside of the card.
Attach the second sheet of card to the inside of the first.
Take another sheet of card and draw out a heart with two lips / kisses at either side.
Cut out the shape and fold in half at the heart.
Fold the kisses in to the heart.
Glue the kisses down in to the inside of the card so that when it is open the heart pops up. Decorate with glitter, paint or anything you like.