Cut out paper keys of different sizes and number them
and place them round the room.
The paper from which the
keys have been cut is placed at one end of the room, each
hole being numbered with higher numbers than the keys.
Each Leader has a paper with the hole numbers on it,
and his Patrol go round the room looking at the keys and
holes and then tell their Leader which key they think fits
into each hole.
After a given time the Scoutmaster reads
aloud the hole numbers with their corresponding key
numbers, and the Patrol with most correct wins.