John Torode: Bread sticks. Biodegradable and edible at the same time. Presently he's looking a little bit wonky, but I'm confident. Dr Maggie Aderin-Pocock: Coffee stirrers and bread stick may ...

This gadget is a splendid blend of art and science, and you can see it in the video below the break. If you’re inspired, you might want to look up polariscope projects, or other birefringence ...