The boys watched how to make this in a TV programme about using up rubbish (I so need to watch this as we have plenty of that!).
So easy and fun too..
Take an empty crisp packet (or anything that is made of crisp wrapper type paper).
Place it on a baking tray and cover with baking parchment.
Put into a hot oven (220 degrees) .
Check after a minute and if shrunk leave to cool, if not give it another 30-60 seconds.
When cooled stick on a safety pin to the back and have fun with your cool new badge!