What is colouring for adults?

I’ve recently been watching a fantastic artist on YouTube. She does a lot of colouring in colouring books but her final results are amazing. It made me think of a fad a few years ago (that is probably still going on… though because I no longer work at an art supply store I can’t really say anymore) about adult colouring books. Are they relaxing or are they stressful? Is there benefit to doing this regularly? […]