Shrinkies - Ultimate CollectionEach set includes everything you need to make your own fabulous shrink art jewellery. Simply colour the beautifully illustrated pre cut designs, pop them in the oven and watch them magically shrink to 40% of their original size, in front of your eyes! As your charms shrinks the colours become more intense. Follow these simple instructions for loads of fun: Colour your Shrinkie using the pencils provided Pre heat oven to 165 (325) Line a baking tray.