7.2.12 - Drawing a circle with a compass

I was doing some decluttering and cleaning out my drawers and the boys came across this compass that I used when I was in secondary school. E started to play with it, so I pondered whether to take it away from him (It's sharp) or to teach him how to use it properly.

I decided to trust him and go with the latter. I taught him to draw circles with it. After several tries, he could  do it on his own.