Jigsaw heart made out of a an old jigsaw

This looks very effective and is a good way of using jigsaws with missing pieces

Start by cutting out a heart out of cardboard, wide enough to support the jigsaw pieces. Glue the jigsaw pieces to the heart, hiding as much as the cardboard as possible. Carry on layering until you cannot see the cardboard. To add stability glue some jigsaw pieces onto the back of the heart too. Leave to dry, glue a piece of ribbon on the top and display