I took a Twitter break when the kids were off school so I could fit in more time with them between work. I had a sketchbook with me and here are a few scans.
I used some old Lyra graphite crayons I’d found, left over from The Day Of The Triffids.
I really loved drawing with them. They work nicely on tracing paper too.
I’m not sure if you can even get them any more, but there seem to be comparable products available.