They children receive morse code messages. Have Based around the room / area the alphabet with its morse code. send them to discover and crack the code of their message
Indiviadual alphabet Morse Code crib sheets positioned around the area
Morse Code messages
Pencils and paper
Depending on the number of children available and their ages divide into groups or individuals. Make the code cracking messages relevant to the general theme of the meeting and as easy / difficult to crack depending on members ages.