Making different shelter designs based using a 3x3m tarp (or 4x4.5m)
Tarp (3x3m or 4.5m)
Sticks or walking poles
Assemble tarps as shown in files.
Identify the most fun/interesting/useful
Work out when they would work best etc (cold, windy, wet, dry, most people, least equipment etc)
Best to try a few out first, or have more than one tarp for different patrols to play with.
Hold a competition for the best shelter