I remember for a time breakfast cereals gave away these playing card sized sheets of film with popular cartoon characters, The Flintstones, etc. You coloured them in and then cooked them in the oven. They shrank into thick indestructible tiles you could put on a keyring, if you had remembered to put a hole in them first. Were they called Shrinky Dinks? Why did we stop getting them free with our cereal? When was the last time anyone saw any?
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