When I headed over to a local scout group, the venture scouts (I'm out of touch) had set out chairs and such like and covered with ground sheets. It was small and as we had a mix of keenness, the less keen I took out side to rig up some different pulley combinations to see who could hoist up a sack of rocks. We moved up through 9mm rope, 10mm and 16mm then used a jammer, which was good for highlighting the issue of getting the load off the rope to release. and lastly we used an autolock descender with a couple other guys pulling with clamps.
To finish off I stuck in two pulleys and let the smallest kid give it a go and after a sneaky bag swap for the partly filled styrofoam bag, I tried to pass it off as a work smarter not harder session.
Back in the hall, some scouts were off doing something they needed to do for a badge assessment coming up and so there were about 10 scouts left so I dished out some notebooks, tape measures and compasses, to which they needed no introduction. I stuck a sticker on the floor at the entrance as coordinate 0,0 and start and finish point, I asked them to note using bearing and length centreline with a different colour sticker per team of 2 at corners, one scout on the compass and one on the tape, then as it was a loop, they swapped over and went back again using the same stickers they used for corner centre points.
They took the average of their two set of numbers and then on their whiteboard drew up what they came up with. That needed a careful eye which luckily someone else did.
Most were total trash, missing corners and such like, but one pair were actually paying attention and did really well something like 50mm out e&n, luck maybe but I'd be pretty impressed with that I think it was at least 10 legs all at least 2m.
Good fun but reliant on the older scouts doing all the work ahead of time. Must have taken hours to build up their cave.