Not sure where I found them but I have a pack of kids coloured graphite sticks. Rather than having pencil points, they have hexagonal ends. This means you can get thick and thin lines. You can also do large shapes holding the sticks side on.
But I got a bit carried away with scribbling, I felt I needed to bring back ‘a bit of order’ or definition and went over the two layers with a 4B pencil.
It kind of gives you a couple of goes at drawing the same thing. That’s ok, some of us (me!) need a few attempts. Imagine having the visual intelligence and accuracy of Leonardo Da Vinci or closer to our times, Lloyd Rees. Sigh.