I learned this technique recently from Carla Sonheim… creating flowers inspired by vintage buttons:
I drew my design with a ballpoint pen, colored it with crayons and covered the design with (water soluble) Tombow markers. I finished by softening my design with a damp paper towel.
I then cut out my design and glued them to my page with a glue stick. I added some flower stems with the same technique. This is definitely something I want to explore further!