One thing I do need to work on a bit more is how to tie a knot backwards. When you tie a knot you are holding it in front of you. When you try to show someone else, you need to turn it around so that they see the view you normally see and you are looking at the back of the knot
Just an idea, but have you thought about getting a cheap lipstick/bullet camera. They cost here about $70 Australian dollars. If you connect it to a TV, they see what you see. Some of the guys here have them clipped onto their helmets while they ride. (motocross, enduro etc) For this exercise you can zip tie it the the peak of a baseball cap, and as you are tie it shows up on the TV.
I'm sure with the scouts, you could find lots of other uses for the camera aswell.
Alternatively put a normal video camera connected to the TV on a tripod or something similar and stand behind the tripod with your hands in front of the camera.