Give the Patrol Leader's sealed orders. At a given signal, each one opens her envelopes.
FIRST CHALLENGE: Go with your patrol and collect 12 sticks 20 cms long and six sticks 10 cms long. Do not break them off trees. First patrol back with all sticks collects the next envelope.
SECOND CHALLENGE: Collect 12 small stones all the same size. Take to leader for next envelope.
THIRD CHALLENGE: Lay a trail with sticks and stones from your patrol tent to leader (or any given point). First patrol to finish with all signs correct gets points. (Could be checked by having the patrol second from another patrol follow the trail).