Don't you find it maddening when you peel an outline sticker from the sheet and notice that the bits left behind also make a great picture, if only you could peel them and put them in the right place to recreate the picture. Well now you can.
All you need to do is stick a piece of masking tape onto the remaining pieces then peel it carefully to lift the pieces from the backing sheet. PLace the image where you would like it, then rub vary hard onto the back of the masking tape. The image should stick to your project allowing you to remove the masking tape.
So to make a beautiful card with a butterfly outline sticker. Select an A5 piece of Coloured card, fold it in half. Select a piece of background medium in a matching colour and mount this onto the front of your card. Then simply peel the Butterfly and place on your card, you can then colour the wing sections in different colours to great effect.
You can then use the above method to add a second butterfly shape from the middles of your first butterfly.
To finish your card you could add a plain paper insert and a matching C6 envelope.