gobstopper codebreakers

This idea is for gobstoppers or any sweet made up of layers of hard candy which are successively dissolved to have letters and numbers printed (in edible colouring) between the layers. The letters would be clues to crack codes and code text which would have to be deciphered. This would start fairly easy, so a packet of six gobstoppers would have one which revealed the key to the code - "A=1" and the other five each with numbers corresponding to the letters A, G, I, C, M - type the word "MAGIC" into the website for your reward.

The later 'editions' of these sweets would be harder and harder, with multiple letters per gobstopper, more sophisticated codes, incomplete messages and, later, messages spread across many hundreds of packets of gobstoppers, gradually advancing the code-breaking and cryptographic skills of a generation of children and requiring co-operation from large numbers of children, perhaps through posting message or code fragments on the internet or running dictionary or letter-frequency attacks, before the message is cracked.